August 2025 - NANOG - lists.nanog.org

Weekly Global IPv4 Routing Table Report
by Routing Table Analysis Role Account 15 Aug '25

15 Aug '25

This is an automated weekly mailing describing the state of the Global IPv4 Routing Table as seen from APNIC's router in Japan. The posting is sent to APOPS, NANOG, AfNOG, SANOG, PacNOG, SAFNOG UKNOF, TZNOG, MENOG, BJNOG, SDNOG, CMNOG, LACNOG and the RIPE Routing WG. Daily listings are sent to bgp-stats(a)lists.apnic.net. For historical data, please see https://thyme.apnic.net. If you have any comments please contact Philip Smith <pfsinoz(a)gmail.com>. IPv4 Routing Table Report 04:00 +10GMT Sat 16 Aug, 2025 IPv4 BGP Table (Global) as seen at Japan. Report Website: https://thyme.apnic.net Detailed Analysis: https://thyme.apnic.net/current/ Analysis Summary ---------------- BGP routing table entries examined: 995406 Prefixes after maximum aggregation (per Origin AS): 386302 Deaggregation factor: 2.58 Unique aggregates announced (without unneeded subnets): 489519 Number of IPv4 prefixes with a valid ROA: 557114 Number of IPv4 prefixes with an invalid ROA: 1155 Number of IPv4 prefixes with no ROA: 437137 Total ASes present in the Internet Routing Table: 77277 Prefixes per ASN: 12.88 Origin-only ASes present in the Internet Routing Table: 66106 Origin ASes announcing only one prefix: 27026 Transit ASes present in the Internet Routing Table: 11171 Transit-only ASes present in the Internet Routing Table: 561 Average AS path length visible in the Internet Routing Table: 5.2 Max AS path length visible: 59 Max AS path prepend of ASN ( 37447) 54 Prefixes from unregistered ASNs in the Routing Table: 1116 Number of instances of unregistered ASNs: 1157 Number of 32-bit ASNs allocated by the RIRs: 47181 Number of 32-bit ASNs visible in the Routing Table: 38836 Prefixes from 32-bit ASNs in the Routing Table: 207898 Number of bogon 32-bit ASNs visible in the Routing Table: 109 Special use prefixes present in the Routing Table: 1 Prefixes being announced from unallocated address space: 426 Number of addresses announced to Internet: 3108190336 Equivalent to 185 /8s, 67 /16s and 56 /24s Percentage of available address space announced: 84.0 Percentage of allocated address space announced: 84.0 Percentage of available address space allocated: 100.0 Percentage of address space in use by end-sites: 99.6 Total number of prefixes smaller than registry allocations: 324777 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 265393 Total APNIC prefixes after maximum aggregation: 79064 APNIC Deaggregation factor: 3.36 Prefixes being announced from the APNIC address blocks: 256207 Unique aggregates announced from the APNIC address blocks: 105236 APNIC Region origin ASes present in the Internet Routing Table: 14815 APNIC Prefixes per ASN: 17.29 APNIC Region origin ASes announcing only one prefix: 4539 APNIC Region transit ASes present in the Internet Routing Table: 1978 Average APNIC Region AS path length visible: 5.5 Max APNIC Region AS path length visible: 39 Number of APNIC region 32-bit ASNs visible in the Routing Table: 10330 Number of APNIC addresses announced to Internet: 750151424 Equivalent to 44 /8s, 182 /16s and 103 /24s APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431 (pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319, 58368-59391, 63488-64098, 64297-64395, 131072-155961 APNIC Address Blocks 1/8, 14/8, 27/8, 36/8, 39/8, 42/8, 43/8, 49/8, 58/8, 59/8, 60/8, 61/8, 101/8, 103/8, 106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8, 116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8, 123/8, 124/8, 125/8, 126/8, 133/8, 150/8, 153/8, 163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8, 203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8, 222/8, 223/8, ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 292077 Total ARIN prefixes after maximum aggregation: 132815 ARIN Deaggregation factor: 2.20 Prefixes being announced from the ARIN address blocks: 293714 Unique aggregates announced from the ARIN address blocks: 141892 ARIN Region origin ASes present in the Internet Routing Table: 19276 ARIN Prefixes per ASN: 15.24 ARIN Region origin ASes announcing only one prefix: 7042 ARIN Region transit ASes present in the Internet Routing Table: 2002 Average ARIN Region AS path length visible: 4.6 Max ARIN Region AS path length visible: 35 Number of ARIN region 32-bit ASNs visible in the Routing Table: 5295 Number of ARIN addresses announced to Internet: 1349261824 Equivalent to 80 /8s, 108 /16s and 26 /24s ARIN AS Blocks 1-1876, 1902-2042, 2044-2046, 2048-2106 (pre-ERX allocations) 2138-2584, 2615-2772, 2823-2829, 2880-3153 3354-4607, 4865-5119, 5632-6655, 6912-7466 7723-8191, 10240-12287, 13312-15359, 16384-17407 18432-20479, 21504-23551, 25600-26591, 26624-27647, 29696-30719, 31744-33791 35840-36863, 39936-40959, 46080-47103 53248-55295, 62464-63487, 64198-64296, 393216-402332 ARIN Address Blocks 3/8, 4/8, 6/8, 7/8, 8/8, 9/8, 11/8, 12/8, 13/8, 15/8, 16/8, 17/8, 18/8, 19/8, 20/8, 21/8, 22/8, 23/8, 24/8, 26/8, 28/8, 29/8, 30/8, 32/8, 33/8, 34/8, 35/8, 38/8, 40/8, 44/8, 45/8, 47/8, 48/8, 50/8, 52/8, 54/8, 55/8, 56/8, 63/8, 64/8, 65/8, 66/8, 67/8, 68/8, 69/8, 70/8, 71/8, 72/8, 73/8, 74/8, 75/8, 76/8, 96/8, 97/8, 98/8, 99/8, 100/8, 104/8, 107/8, 108/8, 128/8, 129/8, 130/8, 131/8, 132/8, 134/8, 135/8, 136/8, 137/8, 138/8, 139/8, 140/8, 142/8, 143/8, 144/8, 146/8, 147/8, 148/8, 149/8, 152/8, 155/8, 156/8, 157/8, 158/8, 159/8, 160/8, 161/8, 162/8, 164/8, 165/8, 166/8, 167/8, 168/8, 169/8, 170/8, 172/8, 173/8, 174/8, 184/8, 192/8, 198/8, 199/8, 204/8, 205/8, 206/8, 207/8, 208/8, 209/8, 214/8, 215/8, 216/8, RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 277570 Total RIPE prefixes after maximum aggregation: 136985 RIPE Deaggregation factor: 2.03 Prefixes being announced from the RIPE address blocks: 276630 Unique aggregates announced from the RIPE address blocks: 178781 RIPE Region origin ASes present in the Internet Routing Table: 29022 RIPE Prefixes per ASN: 9.53 RIPE Region origin ASes announcing only one prefix: 12080 RIPE Region transit ASes present in the Internet Routing Table: 4038 Average RIPE Region AS path length visible: 5.2 Max RIPE Region AS path length visible: 49 Number of RIPE region 32-bit ASNs visible in the Routing Table: 12642 Number of RIPE addresses announced to Internet: 732274304 Equivalent to 43 /8s, 165 /16s and 158 /24s RIPE AS Blocks 1877-1901, 2043, 2047, 2107-2136, 2585-2614 (pre-ERX allocations) 2773-2822, 2830-2879, 3154-3353, 5377-5631 6656-6911, 8192-9215, 12288-13311, 15360-16383 20480-21503, 24576-25599, 28672-29695 30720-31743, 33792-35839, 38912-39935 40960-45055, 47104-52223, 56320-58367 59392-61439, 61952-62463, 64396-64495 196608-216475 RIPE Address Blocks 2/8, 5/8, 25/8, 31/8, 37/8, 46/8, 51/8, 53/8, 57/8, 62/8, 77/8, 78/8, 79/8, 80/8, 81/8, 82/8, 83/8, 84/8, 85/8, 86/8, 87/8, 88/8, 89/8, 90/8, 91/8, 92/8, 93/8, 94/8, 95/8, 109/8, 141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8, 193/8, 194/8, 195/8, 212/8, 213/8, 217/8, LACNIC Region Analysis Summary ------------------------------ Prefixes being announced by LACNIC Region ASes: 124536 Total LACNIC prefixes after maximum aggregation: 29889 LACNIC Deaggregation factor: 4.17 Prefixes being announced from the LACNIC address blocks: 120801 Unique aggregates announced from the LACNIC address blocks: 49074 LACNIC Region origin ASes present in the Internet Routing Table: 11281 LACNIC Prefixes per ASN: 10.71 LACNIC Region origin ASes announcing only one prefix: 2657 LACNIC Region transit ASes present in the Internet Routing Table: 2570 Average LACNIC Region AS path length visible: 6.0 Max LACNIC Region AS path length visible: 56 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 9253 Number of LACNIC addresses announced to Internet: 171093248 Equivalent to 10 /8s, 50 /16s and 173 /24s LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 61440-61951, 64099-64197, 262144-274844 + ERX transfers LACNIC Address Blocks 177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8, 191/8, 200/8, 201/8, AfriNIC Region Analysis Summary ------------------------------- Prefixes being announced by AfriNIC Region ASes: 34714 Total AfriNIC prefixes after maximum aggregation: 6813 AfriNIC Deaggregation factor: 5.10 Prefixes being announced from the AfriNIC address blocks: 47628 Unique aggregates announced from the AfriNIC address blocks: 14161 AfriNIC Region origin ASes present in the Internet Routing Table: 1955 AfriNIC Prefixes per ASN: 24.36 AfriNIC Region origin ASes announcing only one prefix: 708 AfriNIC Region transit ASes present in the Internet Routing Table: 383 Average AfriNIC Region AS path length visible: 6.1 Max AfriNIC Region AS path length visible: 59 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1316 Number of AfriNIC addresses announced to Internet: 105167872 Equivalent to 6 /8s, 68 /16s and 188 /24s AfriNIC AS Blocks 36864-37887, 327680-329727 & ERX transfers AfriNIC Address Blocks 41/8, 102/8, 105/8, 154/8, 196/8, 197/8, APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 9808 12936 8762 117 CHINAMOBILE-CN China Mobile Communication 7545 6138 838 616 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 4803 4192 76 ERX-CERNET-BKB China Education and Resear 9498 4466 536 311 BBIL-AP BHARTI Airtel Ltd., IN 7552 3962 1332 27 VIETEL-AS-AP Viettel Group, VN 7713 3698 1044 66 TELKOMNET-AS-AP PT Telekomunikasi Indones 45899 3305 1869 101 VNPT-AS-VN VNPT Corp, VN 56046 2974 812 181 CMNET-JIANGSU-AP China Mobile communicati 24560 2923 865 503 AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., 4766 2302 11519 605 KIXS-AS-KR Korea Telecom, KR Complete listing at https://thyme.apnic.net/current/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 13804 41097 5327 AMAZON-02, US 11492 4733 314 786 CABLEONE, US 7155 3859 286 85 VIASAT-SP-BACKBONE, US 6327 3646 1320 82 SHAW, CA 22773 3341 3029 164 ASN-CXA-ALL-CCI-22773-RDC, US 174 3280 8769 857 COGENT-174, US 749 3222 54766 2473 DNIC-AS-00749, US 396982 3215 3858 436 GOOGLE-CLOUD-PLATFORM, US 4155 2939 229 1740 USDA-1, US 16625 2913 1224 2165 AKAMAI-AS, US Complete listing at https://thyme.apnic.net/current/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 12479 7554 1711 149 UNI2-AS, ES 39891 4798 293 63 ALJAWWALSTC-AS, SA 20940 3912 3395 127 AKAMAI-ASN1, NL 9009 3859 366 2176 M247, RO 12389 3119 2315 867 ROSTELECOM-AS PJSC Rostelecom. Technical 34984 2403 361 584 TELLCOM-AS, TR 212238 2331 165 1695 CDNEXT, GB 203020 1633 208 770 HOSTROYALE, IN 13188 1605 100 37 TRIOLAN, UA 8452 1585 1852 14 TE-AS TE-AS, EG Complete listing at https://thyme.apnic.net/current/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8151 12314 3248 585 UNINET, MX 10620 3481 472 1050 Telmex Colombia S.A., CO 13999 2525 511 349 Mega Cable, S.A. de C.V., MX 11830 1982 369 64 Instituto Costarricense de Electricidad y 28573 1371 2433 261 Claro NXT Telecomunicacoes Ltda, BR 3816 1351 788 208 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC, 11664 1228 278 33 Techtel LMDS Comunicaciones Interactivas 6147 1184 371 22 Telefonica del Peru S.A.A., PE 22884 1055 67 375 TOTAL PLAY TELECOMUNICACIONES SA DE CV, M 26615 1017 2487 55 TIM SA, BR Complete listing at https://thyme.apnic.net/current/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 24835 1770 660 28 RAYA-AS, EG 29571 1499 94 32 ORANGE-COTE-IVOIRE, CI 36992 1421 1501 377 ETISALAT-MISR, EG 36903 1249 554 96 MT-MPLS, MA 24863 1243 389 20 LINKdotNET-AS, EG 37069 1086 1112 11 MOBINIL, EG 36935 990 522 45 Vodafone-, EG 20011 576 154 212 INTERNET-SOLUTIONS, ZA 36914 572 82 3 KENET-AS, KE 15399 536 57 59 WANANCHI-, KE Complete listing at https://thyme.apnic.net/current/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 13804 41097 5327 AMAZON-02, US 9808 12936 8762 117 CHINAMOBILE-CN China Mobile Communication 8151 12314 3248 585 UNINET, MX 12479 7554 1711 149 UNI2-AS, ES 7545 6138 838 616 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 4803 4192 76 ERX-CERNET-BKB China Education and Resear 39891 4798 293 63 ALJAWWALSTC-AS, SA 11492 4733 314 786 CABLEONE, US 9498 4466 536 311 BBIL-AP BHARTI Airtel Ltd., IN 7552 3962 1332 27 VIETEL-AS-AP Viettel Group, VN Complete listing at https://thyme.apnic.net/current/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 9808 12936 12819 CHINAMOBILE-CN China Mobile Communications Grou 8151 12314 11729 UNINET, MX 12479 7554 7405 UNI2-AS, ES 7545 6138 5522 TPG-INTERNET-AP TPG Telecom Limited, AU 39891 4798 4735 ALJAWWALSTC-AS, SA 4538 4803 4727 ERX-CERNET-BKB China Education and Research Net 9498 4466 4155 BBIL-AP BHARTI Airtel Ltd., IN 11492 4733 3947 CABLEONE, US 7552 3962 3935 VIETEL-AS-AP Viettel Group, VN 20940 3912 3785 AKAMAI-ASN1, NL Complete listing at https://thyme.apnic.net/current/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 32182 UNALLOCATED 8.9.96.0/23 3356 LEVEL3, US 33123 UNALLOCATED 8.10.69.0/24 174 COGENT-174, US 46639 UNALLOCATED 8.17.66.0/24 701 UUNET, US 53775 UNALLOCATED 8.20.88.0/24 7029 WINDSTREAM, US 396146 UNALLOCATED 8.21.227.0/24 3356 LEVEL3, US 393266 UNALLOCATED 8.23.52.0/24 46887 CROWNCASTLE-AS46887, US 398074 UNALLOCATED 8.28.115.0/24 32787 PROLEXIC-TECHNOLOGIES-D 396894 UNALLOCATED 8.28.201.0/24 3356 LEVEL3, US 394936 UNALLOCATED 8.33.224.0/24 22442 HOU-PHONOSCOPE, US 54338 UNALLOCATED 8.33.241.0/24 3356 LEVEL3, US Complete listing at https://thyme.apnic.net/current/data-badAS Prefixes from the Special Purpose Address Registry (Global) ----------------------------------------------------------- Prefix Origin AS Description 192.88.99.0/24 6939 HURRICANE, US Complete listing at https://thyme.apnic.net/current/data-spar Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 14.192.20.0/22 Origin: 26658 HENGTONG-IDC-LLC, US 14.192.20.0/22 Transit: 21859 ZEN-ECN, US 23.140.216.0/24 Origin: 27176 DATAWAGON, US 23.140.216.0/24 Transit: 20278 NEXEON, US 23.141.0.0/24 Origin: 395350 RESERVED, ZZ 23.141.0.0/24 Transit: 11426 TWC-11426-CAROLINAS, US 23.142.24.0/24 Origin: 62164 HEYMMAN-2, CA 23.142.24.0/24 Transit: 64236 UNREAL-SERVERS, US 23.147.224.0/24 Origin: 27392 639-DATACENTERS, US 23.147.224.0/24 Transit: 3356 LEVEL3, US Complete listing at https://thyme.apnic.net/current/data-add-IANA Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:16 /9:14 /10:41 /11:92 /12:298 /13:579 /14:1200 /15:2131 /16:13811 /17:8275 /18:13563 /19:24757 /20:44808 /21:52302 /22:112562 /23:103172 /24:616994 /25:791 /26:0 /27:0 /28:0 /29:0 /30:0 /31:0 /32:0 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 8151 6544 12314 UNINET, MX 12479 6514 7554 UNI2-AS, ES 11492 3552 4733 CABLEONE, US 39891 3489 4798 ALJAWWALSTC-AS, SA 6327 3442 3646 SHAW, CA 7155 2818 3859 VIASAT-SP-BACKBONE, US 22773 2495 3341 ASN-CXA-ALL-CCI-22773-RDC, US 16509 2367 13804 AMAZON-02, US 30036 2297 2640 MEDIACOM-ENTERPRISE-BUSINESS, US 10620 2201 3481 Telmex Colombia S.A., CO Complete listing at https://thyme.apnic.net/current/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:1773 2:1501 3:885 4:10 5:4712 6:158 7:6 8:1562 9:3 11:172 12:1255 13:456 14:2623 15:377 16:285 17:379 18:901 20:564 21:4 22:188 23:7774 24:2656 25:2 27:2740 29:19 31:3361 32:32 33:1 34:80 35:263 36:4272 37:4566 38:9383 39:984 40:263 41:4280 42:938 43:2680 44:380 45:18662 46:5119 47:339 49:1935 50:2051 51:591 52:1548 54:321 55:1088 56:11 57:279 58:2149 59:1346 60:1176 61:2890 62:3015 63:1784 64:5581 65:2143 66:4788 67:3092 68:1076 69:3899 70:1039 71:630 72:2849 74:2816 75:1506 76:607 77:2773 78:1892 79:1735 80:2226 81:2071 82:3255 83:1437 84:1924 85:3455 86:1122 87:2394 88:1321 89:4457 90:775 91:8409 92:2758 93:2962 94:4141 95:4438 96:1445 97:311 98:958 99:709 100:71 101:1212 102:3899 103:32222 104:5270 105:742 106:875 107:2644 108:1276 109:4190 110:2244 111:3644 112:2456 113:1578 114:1977 115:2152 116:2070 117:2690 118:2519 119:1940 120:2222 121:1385 122:2824 123:2230 124:1725 125:2913 126:91 128:1600 129:978 130:1297 131:2059 132:781 133:450 134:1613 135:356 136:1470 137:1185 138:2830 139:1595 140:1620 141:1535 142:1914 143:1982 144:1172 145:575 146:2182 147:2105 148:2697 149:2983 150:1266 151:2336 152:2108 153:528 154:7559 155:1880 156:3100 157:1940 158:1379 159:2529 160:3593 161:1907 162:3895 163:2261 164:1878 165:2463 166:1544 167:2044 168:3896 169:783 170:5220 171:1004 172:4229 173:3389 174:905 175:1315 176:3748 177:4746 178:3991 179:2321 180:2590 181:4176 182:3591 183:2028 184:2068 185:21607 186:5229 187:4667 188:4275 189:4335 190:9521 191:1531 192:11345 193:9490 194:7800 195:5633 196:3293 197:3217 198:6230 199:8646 200:8220 201:6377 202:10622 203:10604 204:4605 205:3661 206:4560 207:3645 208:4284 209:5181 210:4919 211:2729 212:4617 213:3840 214:1038 215:51 216:6795 217:3301 218:1484 219:566 220:2139 221:1209 222:874 223:2818 End of report

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9.9.9.9 not taking DNS traffic over PCH through DE-CIX in Dallas
by Eric C. Miller 15 Aug '25

15 Aug '25

A mouthful, but we're seeing an issue where we can ping 9.9.9.9 but not get response to UDP/53 dns queries. Filtering the prefix 9.9.9.0/24 and taking transports seems to run fine. We're also seeing TCP Resets on SecureDNS. Anyone else seeing something similar? Eric

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LAG/ECMP and 'exact-route'
by Saku Ytti 15 Aug '25

15 Aug '25

Hey-o, Which platform/software has a command to show which interface will be used for forwarding with given keys? ASR9k has a cef exec-route, and I see references to this in c-nsp, reddit and cisco.com forums, stressing how useful debugging tool it has been. Despite it not actually working, since it's just RE software, it doesn't talk to the EZchip/lightspeed, unless it has been fixed in the past couple of years, certainly hasn't worked in the timeline of various forums finding it useful. MX has 'jsim' https://www.juniper.net/documentation/en_US/day-one-books/TW_MX3D_PacketWal… which I think actually works, but it is quite involved. I have some (false?) memory that I saw in some release note this being a bit more productised into CLI command, but I'm failing to find anything to support this memory. There is also RFC5837, which is actually implemented in QFX5k, but not for TTL exceeded, we've opened ER to get it supported on MX and PTX and for TTL exceeded. This RFC will allow programmatic platform agnostic discovery of the actual interface used, without relying on platform specific magic. So please do ask your vendors to implement it. -- ++ytti

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The NANOG 95 CFP is open through 08-September-2025
by NANOG Program 13 Aug '25

13 Aug '25

NANOG Community at large, The NANOG Program Committee (PC) would like to remind you that we are accepting proposals through Monday, 08 September 2025, for in-person or live remote presentations at all sessions of NANOG 95 taking place in Arlington, TX on 27-29 October 2025. Sometimes, we deal with our own projects so regularly that they no longer seem cool or interesting to us - but they are to other people! Sometimes you want to present, but don’t know what other people want to learn about. During every NANOG Conference we ask everyone to answer the surveys and tell us what they want to hear about at a future conference. Some of the most recent answers are below. If you have a presentation on any of these general or specific topic areas, your community would love to hear from you! AI / Automation Topics - AI vs “traditional” datacenter networks - Automation approaches - Designing networks for AI traffic - Details on how to define and build AI agents - Network automation technologies - Early-career Professional Development topics - Basic hands-on tutorial track - More career development topics - Emerging technologies topics - More on net infra evolution and the drivers around it - New protocols, technologies, IETF work, etc. - Enterprise Topics - Enterprises interacting with ISPs and the Internet - Overlays - Performance - Open source/freely available tools to move data quickly and efficiently - More information about how to measure and improve network performance from hosts. - Routing / BGP Topics - BGP Route Maps - Integrating IPv6 - Interplanetary networking - More on BGP in data centers like the "lightweight traffic engineering" talk - RPKI, Routing - Peering - Residential Broadband - Segment routing - Researcher / Student Topics - Opportunity for students to network - Researcher / operator BoF / forum - Security Topics - AI-driven botnets and residential proxies - DDoS mitigation topics - Security and IOT - Soft skills - Attracting software developers to network development/engineering - Career development - Computing and internet history - Intro to NANOG mailing list and other operational communities - Risk-based financial decision making - Transitioning from technical roles to management - Troubleshooting and best practices - Layer 2 ethernet best practices - Network architecture or on-prem troubleshooting - Provisioning, troubleshooting - Workshops and How-Tos - More in-depth how-tos / more in-depth seminars - Physical hands on labs - Other - Edge computing - Hardware topics such as ASIC or specific software oriented network engineering - How to start an ISP from scratch - More cloud network specific topics - Starlink - - Submit your presentation proposal and abstract via the Program Committee Tool at: https://www.nanog.org/meetings/submit-presentation/ - Sign in with your Profile Account - Select the type of talk you propose to present, and complete the form Timeline for submission and proposal review: NANOG 95 Calendar of Events Date Event/Deadline September 08, 2025 DRAFT Presentation Slides Due September 22, 2025 Meeting Agenda Published October 20, 2025 FINAL Slides Due If you have any questions, please email the PC (nanogpc(a)nanog.org) and a representative will respond to you in a timely manner. Otherwise, submit your talk, tutorial, track, or panel proposal to the Program Committee Tool at your earliest convenience. We look forward to reviewing your submission! Sincerely, Adair Thaxton Program Committee Chair Sent on behalf of the NANOG PC

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Speaking of DNS server software...
by William Herrin 12 Aug '25

12 Aug '25

Can anyone recommend software for an authoritative DNS server where the open source code is clean and well documented? I have an anycast-related experiment I'd like to put together and I want to be able to quickly shoehorn it into existing code. I looked at the source for ISC Bind but the code complexity is far beyond anything I'd want to touch for a casual experiment. Please don't use macros (#defines) to construct your C function _definitions_. I realize C allows it but it turns your code into a meta-language that no one else knows. Regards, Bill Herrin -- William Herrin bill(a)herrin.us https://bill.herrin.us/

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Cloudflare blocking Cogent again
by Miller, Jon 11 Aug '25

11 Aug '25

We are seeing multiple Cloudflare sites blocked on our Cogent circuits. Three Cogent circuits from two clients in two states are blocked. I opened a ticket with Cogent, but the last time this happened, they just shrugged and said "not our fault." Are any other Cogent customers seeing this? Any advice on how to resolve? Here are the sites we see blocked by Cloudflare. https://www.americanbar.org/ https://www.ballys.com/ https://investor.fanatics.com/investor-relations/default.aspx Jon Miller Bose McKinney & Evans LLP This message and any attachments may contain legally privileged or confidential information, and are intended only for the individual or entity identified above as the addressee. If you are not the addressee, or if this message has been addressed to you in error, you are not authorized to read, copy, or distribute this message and any attachments, and we ask that you please delete this message and attachments (including all copies) and notify the sender. Delivery of this message and any attachments to any person other than the intended recipient(s) is not intended in any way to waive confidentiality or a privilege. All personal messages express views only of the individual sender, and may not be copied or distributed without this statement.

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FYI: NANOG Mailing List IPV4 hosts are in Spamhaus RBL
by Lucien Hoydic 11 Aug '25

11 Aug '25

This from one of the mail servers I manage: H=lists.nanog.org [50.31.151.68] F=<nanog-bounces(a)lists.nanog.org> rejected RCPT <[x](mailto:nanog2@adns.net)xxxx@yyyyy.com>: host is listed in sbl.spamhaus.org Not sure anyone cares - mail still comes in via the IPv6 interface, but interesting that the listserv tries IPV4 1st.

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N95 Keynote Announced! + Watch One of Our Most-Viewed Talks + Welcome to the...
by Nanog News 11 Aug '25

11 Aug '25

*** N95 Welcomes XKL CEO, Cisco Co-Founder Len Bosack as a Keynote* ------------------------------------------------------------ *He Will Present: "5G, Fiber, and Wifi. The IP Takeover is (Almost) Complete"* Len Bosack's talk offers both a historical lens and a forward-looking deep dive into how technologies like private 5G, mobile edge computing, and satellite can be layered with fiber and Ethernet to meet modern demands. *LEARN MORE* (https://nanog.org/events/nanog-95/) *** Welcome to the Silicon Prairie: Why Arlington + Dallas Belong on Every Network Builder’s Radar* ------------------------------------------------------------ *And the Best Part? You get to Experience it all Live at N95 in Arlington, TX (Oct 27–29)* Arlington, TX may be famous for stadiums and thrill rides, but just West of Dallas it’s quietly transforming into a next-gen tech powerhouse. In the heart of the “Silicon Prairie,” it’s where affordability, blazing fiber, and future-ready infrastructure collide. *READ MORE *( https://nanog.org/stories/welcome-to-the-silicon-prairie-why-arlington-dall… ) *** Make an Impact. Educate Your Community. Become a N95 Speaker!* ------------------------------------------------------------ Talk submissions will be accepted until Sept. 8. Don't wait! *MORE INFO* (https://nanog.org/program/call-presentations/) *** Video of the Week—A Not So Funny Thing Happened On The Way To Port 22* ------------------------------------------------------------ *Presented by Joel Jaeggli, **Fastly, * In one of our most viewed videos from N94, this two-part presentation recounts an incident in which the control and forwarding planes became misaligned. *WATCH NOW* ( https://www.youtube.com/watch?v=kxPgy_wTD14&list=PLO8DR5ZGla8gr-Hw8obs1A0wg… ) *** Stay Connected* ------------------------------------------------------------ http://www.facebook.com http://www.instagram.com/nanog_org/ http://www.linkedin.com/company/nanog/ https://www.twitter.com/nanog/ http://nanog.org Elizabeth Drolet Multimedia Content Director

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Weekly Global IPv4 Routing Table Report
by Routing Table Analysis Role Account 08 Aug '25

08 Aug '25

This is an automated weekly mailing describing the state of the Global IPv4 Routing Table as seen from APNIC's router in Japan. The posting is sent to APOPS, NANOG, AfNOG, SANOG, PacNOG, SAFNOG UKNOF, TZNOG, MENOG, BJNOG, SDNOG, CMNOG, LACNOG and the RIPE Routing WG. Daily listings are sent to bgp-stats(a)lists.apnic.net. For historical data, please see https://thyme.apnic.net. If you have any comments please contact Philip Smith <pfsinoz(a)gmail.com>. IPv4 Routing Table Report 04:00 +10GMT Sat 09 Aug, 2025 IPv4 BGP Table (Global) as seen at Japan. Report Website: https://thyme.apnic.net Detailed Analysis: https://thyme.apnic.net/current/ Analysis Summary ---------------- BGP routing table entries examined: 994587 Prefixes after maximum aggregation (per Origin AS): 385540 Deaggregation factor: 2.58 Unique aggregates announced (without unneeded subnets): 489001 Number of IPv4 prefixes with a valid ROA: 555410 Number of IPv4 prefixes with an invalid ROA: 1210 Number of IPv4 prefixes with no ROA: 437967 Total ASes present in the Internet Routing Table: 77222 Prefixes per ASN: 12.88 Origin-only ASes present in the Internet Routing Table: 66053 Origin ASes announcing only one prefix: 26995 Transit ASes present in the Internet Routing Table: 11169 Transit-only ASes present in the Internet Routing Table: 566 Average AS path length visible in the Internet Routing Table: 5.2 Max AS path length visible: 59 Max AS path prepend of ASN ( 37447) 54 Prefixes from unregistered ASNs in the Routing Table: 1100 Number of instances of unregistered ASNs: 1141 Number of 32-bit ASNs allocated by the RIRs: 47097 Number of 32-bit ASNs visible in the Routing Table: 38785 Prefixes from 32-bit ASNs in the Routing Table: 207320 Number of bogon 32-bit ASNs visible in the Routing Table: 111 Special use prefixes present in the Routing Table: 1 Prefixes being announced from unallocated address space: 429 Number of addresses announced to Internet: 3108536448 Equivalent to 185 /8s, 72 /16s and 128 /24s Percentage of available address space announced: 84.0 Percentage of allocated address space announced: 84.0 Percentage of available address space allocated: 100.0 Percentage of address space in use by end-sites: 99.6 Total number of prefixes smaller than registry allocations: 324530 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 264899 Total APNIC prefixes after maximum aggregation: 78932 APNIC Deaggregation factor: 3.36 Prefixes being announced from the APNIC address blocks: 255770 Unique aggregates announced from the APNIC address blocks: 104966 APNIC Region origin ASes present in the Internet Routing Table: 14795 APNIC Prefixes per ASN: 17.29 APNIC Region origin ASes announcing only one prefix: 4514 APNIC Region transit ASes present in the Internet Routing Table: 1981 Average APNIC Region AS path length visible: 5.5 Max APNIC Region AS path length visible: 36 Number of APNIC region 32-bit ASNs visible in the Routing Table: 10305 Number of APNIC addresses announced to Internet: 750337024 Equivalent to 44 /8s, 185 /16s and 60 /24s APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431 (pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319, 58368-59391, 63488-64098, 64297-64395, 131072-155961 APNIC Address Blocks 1/8, 14/8, 27/8, 36/8, 39/8, 42/8, 43/8, 49/8, 58/8, 59/8, 60/8, 61/8, 101/8, 103/8, 106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8, 116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8, 123/8, 124/8, 125/8, 126/8, 133/8, 150/8, 153/8, 163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8, 203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8, 222/8, 223/8, ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 292325 Total ARIN prefixes after maximum aggregation: 132618 ARIN Deaggregation factor: 2.20 Prefixes being announced from the ARIN address blocks: 293841 Unique aggregates announced from the ARIN address blocks: 141819 ARIN Region origin ASes present in the Internet Routing Table: 19268 ARIN Prefixes per ASN: 15.25 ARIN Region origin ASes announcing only one prefix: 7041 ARIN Region transit ASes present in the Internet Routing Table: 2002 Average ARIN Region AS path length visible: 4.6 Max ARIN Region AS path length visible: 36 Number of ARIN region 32-bit ASNs visible in the Routing Table: 5285 Number of ARIN addresses announced to Internet: 1349499136 Equivalent to 80 /8s, 111 /16s and 185 /24s ARIN AS Blocks 1-1876, 1902-2042, 2044-2046, 2048-2106 (pre-ERX allocations) 2138-2584, 2615-2772, 2823-2829, 2880-3153 3354-4607, 4865-5119, 5632-6655, 6912-7466 7723-8191, 10240-12287, 13312-15359, 16384-17407 18432-20479, 21504-23551, 25600-26591, 26624-27647, 29696-30719, 31744-33791 35840-36863, 39936-40959, 46080-47103 53248-55295, 62464-63487, 64198-64296, 393216-402332 ARIN Address Blocks 3/8, 4/8, 6/8, 7/8, 8/8, 9/8, 11/8, 12/8, 13/8, 15/8, 16/8, 17/8, 18/8, 19/8, 20/8, 21/8, 22/8, 23/8, 24/8, 26/8, 28/8, 29/8, 30/8, 32/8, 33/8, 34/8, 35/8, 38/8, 40/8, 44/8, 45/8, 47/8, 48/8, 50/8, 52/8, 54/8, 55/8, 56/8, 63/8, 64/8, 65/8, 66/8, 67/8, 68/8, 69/8, 70/8, 71/8, 72/8, 73/8, 74/8, 75/8, 76/8, 96/8, 97/8, 98/8, 99/8, 100/8, 104/8, 107/8, 108/8, 128/8, 129/8, 130/8, 131/8, 132/8, 134/8, 135/8, 136/8, 137/8, 138/8, 139/8, 140/8, 142/8, 143/8, 144/8, 146/8, 147/8, 148/8, 149/8, 152/8, 155/8, 156/8, 157/8, 158/8, 159/8, 160/8, 161/8, 162/8, 164/8, 165/8, 166/8, 167/8, 168/8, 169/8, 170/8, 172/8, 173/8, 174/8, 184/8, 192/8, 198/8, 199/8, 204/8, 205/8, 206/8, 207/8, 208/8, 209/8, 214/8, 215/8, 216/8, RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 277135 Total RIPE prefixes after maximum aggregation: 136618 RIPE Deaggregation factor: 2.03 Prefixes being announced from the RIPE address blocks: 276130 Unique aggregates announced from the RIPE address blocks: 178665 RIPE Region origin ASes present in the Internet Routing Table: 29004 RIPE Prefixes per ASN: 9.52 RIPE Region origin ASes announcing only one prefix: 12073 RIPE Region transit ASes present in the Internet Routing Table: 4043 Average RIPE Region AS path length visible: 5.2 Max RIPE Region AS path length visible: 49 Number of RIPE region 32-bit ASNs visible in the Routing Table: 12633 Number of RIPE addresses announced to Internet: 732113280 Equivalent to 43 /8s, 163 /16s and 41 /24s RIPE AS Blocks 1877-1901, 2043, 2047, 2107-2136, 2585-2614 (pre-ERX allocations) 2773-2822, 2830-2879, 3154-3353, 5377-5631 6656-6911, 8192-9215, 12288-13311, 15360-16383 20480-21503, 24576-25599, 28672-29695 30720-31743, 33792-35839, 38912-39935 40960-45055, 47104-52223, 56320-58367 59392-61439, 61952-62463, 64396-64495 196608-216475 RIPE Address Blocks 2/8, 5/8, 25/8, 31/8, 37/8, 46/8, 51/8, 53/8, 57/8, 62/8, 77/8, 78/8, 79/8, 80/8, 81/8, 82/8, 83/8, 84/8, 85/8, 86/8, 87/8, 88/8, 89/8, 90/8, 91/8, 92/8, 93/8, 94/8, 95/8, 109/8, 141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8, 193/8, 194/8, 195/8, 212/8, 213/8, 217/8, LACNIC Region Analysis Summary ------------------------------ Prefixes being announced by LACNIC Region ASes: 124501 Total LACNIC prefixes after maximum aggregation: 29853 LACNIC Deaggregation factor: 4.17 Prefixes being announced from the LACNIC address blocks: 120811 Unique aggregates announced from the LACNIC address blocks: 49031 LACNIC Region origin ASes present in the Internet Routing Table: 11280 LACNIC Prefixes per ASN: 10.71 LACNIC Region origin ASes announcing only one prefix: 2657 LACNIC Region transit ASes present in the Internet Routing Table: 2556 Average LACNIC Region AS path length visible: 5.9 Max LACNIC Region AS path length visible: 56 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 9250 Number of LACNIC addresses announced to Internet: 171209728 Equivalent to 10 /8s, 52 /16s and 116 /24s LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 61440-61951, 64099-64197, 262144-274844 + ERX transfers LACNIC Address Blocks 177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8, 191/8, 200/8, 201/8, AfriNIC Region Analysis Summary ------------------------------- Prefixes being announced by AfriNIC Region ASes: 34627 Total AfriNIC prefixes after maximum aggregation: 6793 AfriNIC Deaggregation factor: 5.10 Prefixes being announced from the AfriNIC address blocks: 47606 Unique aggregates announced from the AfriNIC address blocks: 14142 AfriNIC Region origin ASes present in the Internet Routing Table: 1950 AfriNIC Prefixes per ASN: 24.41 AfriNIC Region origin ASes announcing only one prefix: 710 AfriNIC Region transit ASes present in the Internet Routing Table: 382 Average AfriNIC Region AS path length visible: 6.1 Max AfriNIC Region AS path length visible: 59 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1312 Number of AfriNIC addresses announced to Internet: 105135360 Equivalent to 6 /8s, 68 /16s and 61 /24s AfriNIC AS Blocks 36864-37887, 327680-329727 & ERX transfers AfriNIC Address Blocks 41/8, 102/8, 105/8, 154/8, 196/8, 197/8, APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 9808 12672 8762 117 CHINAMOBILE-CN China Mobile Communication 7545 6140 837 623 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 4812 4192 76 ERX-CERNET-BKB China Education and Resear 9498 4468 536 312 BBIL-AP BHARTI Airtel Ltd., IN 7552 3941 1332 27 VIETEL-AS-AP Viettel Group, VN 7713 3693 1044 66 TELKOMNET-AS-AP PT Telekomunikasi Indones 45899 3302 1869 101 VNPT-AS-VN VNPT Corp, VN 56046 2971 812 181 CMNET-JIANGSU-AP China Mobile communicati 24560 2921 864 513 AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., 4766 2308 11519 605 KIXS-AS-KR Korea Telecom, KR Complete listing at https://thyme.apnic.net/current/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 13769 41094 5298 AMAZON-02, US 11492 4795 318 661 CABLEONE, US 7155 3859 286 85 VIASAT-SP-BACKBONE, US 6327 3644 1320 82 SHAW, CA 174 3527 8769 850 COGENT-174, US 22773 3336 3029 165 ASN-CXA-ALL-CCI-22773-RDC, US 749 3222 54766 2473 DNIC-AS-00749, US 396982 3204 3858 436 GOOGLE-CLOUD-PLATFORM, US 16625 2927 1232 2174 AKAMAI-AS, US 4155 2911 227 1734 USDA-1, US Complete listing at https://thyme.apnic.net/current/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 12479 7568 1711 153 UNI2-AS, ES 39891 4798 293 63 ALJAWWALSTC-AS, SA 20940 3913 3395 127 AKAMAI-ASN1, NL 9009 3858 366 2175 M247, RO 12389 3118 2315 867 ROSTELECOM-AS PJSC Rostelecom. Technical 34984 2404 361 584 TELLCOM-AS, TR 212238 2327 164 1692 CDNEXT, GB 13188 1605 100 37 TRIOLAN, UA 8452 1584 1852 14 TE-AS TE-AS, EG 203020 1519 191 670 HOSTROYALE, IN Complete listing at https://thyme.apnic.net/current/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8151 12321 3271 574 UNINET, MX 10620 3475 472 1052 Telmex Colombia S.A., CO 13999 2527 511 354 Mega Cable, S.A. de C.V., MX 11830 1986 369 64 Instituto Costarricense de Electricidad y 28573 1371 2433 261 Claro NXT Telecomunicacoes Ltda, BR 3816 1351 788 208 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC, 11664 1210 278 33 Techtel LMDS Comunicaciones Interactivas 6147 1181 371 22 Telefonica del Peru S.A.A., PE 22884 1063 68 369 TOTAL PLAY TELECOMUNICACIONES SA DE CV, M 26615 1017 2487 55 TIM SA, BR Complete listing at https://thyme.apnic.net/current/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 24835 1770 660 28 RAYA-AS, EG 29571 1484 94 32 ORANGE-COTE-IVOIRE, CI 36992 1417 1494 373 ETISALAT-MISR, EG 36903 1249 554 96 MT-MPLS, MA 24863 1239 389 20 LINKdotNET-AS, EG 37069 1086 1112 11 MOBINIL, EG 36935 972 520 43 Vodafone-, EG 36914 573 82 3 KENET-AS, KE 20011 568 154 212 INTERNET-SOLUTIONS, ZA 15399 537 57 59 WANANCHI-, KE Complete listing at https://thyme.apnic.net/current/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 13769 41094 5298 AMAZON-02, US 9808 12672 8762 117 CHINAMOBILE-CN China Mobile Communication 8151 12321 3271 574 UNINET, MX 12479 7568 1711 153 UNI2-AS, ES 7545 6140 837 623 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 4812 4192 76 ERX-CERNET-BKB China Education and Resear 39891 4798 293 63 ALJAWWALSTC-AS, SA 11492 4795 318 661 CABLEONE, US 9498 4468 536 312 BBIL-AP BHARTI Airtel Ltd., IN 7552 3941 1332 27 VIETEL-AS-AP Viettel Group, VN Complete listing at https://thyme.apnic.net/current/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 9808 12672 12555 CHINAMOBILE-CN China Mobile Communications Grou 8151 12321 11747 UNINET, MX 12479 7568 7415 UNI2-AS, ES 7545 6140 5517 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 4812 4736 ERX-CERNET-BKB China Education and Research Net 39891 4798 4735 ALJAWWALSTC-AS, SA 9498 4468 4156 BBIL-AP BHARTI Airtel Ltd., IN 11492 4795 4134 CABLEONE, US 7552 3941 3914 VIETEL-AS-AP Viettel Group, VN 20940 3913 3786 AKAMAI-ASN1, NL Complete listing at https://thyme.apnic.net/current/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 33123 UNALLOCATED 8.10.69.0/24 174 COGENT-174, US 46639 UNALLOCATED 8.17.66.0/24 701 UUNET, US 53775 UNALLOCATED 8.20.88.0/24 7029 WINDSTREAM, US 393266 UNALLOCATED 8.23.52.0/24 46887 CROWNCASTLE-AS46887, US 398074 UNALLOCATED 8.28.115.0/24 32787 PROLEXIC-TECHNOLOGIES-D 396894 UNALLOCATED 8.28.201.0/24 3356 LEVEL3, US 394936 UNALLOCATED 8.33.224.0/24 22442 HOU-PHONOSCOPE, US 54338 UNALLOCATED 8.33.241.0/24 3356 LEVEL3, US 46639 UNALLOCATED 8.38.73.0/24 3356 LEVEL3, US 395195 UNALLOCATED 8.38.115.0/24 3356 LEVEL3, US Complete listing at https://thyme.apnic.net/current/data-badAS Prefixes from the Special Purpose Address Registry (Global) ----------------------------------------------------------- Prefix Origin AS Description 192.88.99.0/24 6939 HURRICANE, US Complete listing at https://thyme.apnic.net/current/data-spar Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 14.192.20.0/22 Origin: 26658 HENGTONG-IDC-LLC, US 14.192.20.0/22 Transit: 21859 ZEN-ECN, US 23.140.216.0/24 Origin: 27176 DATAWAGON, US 23.140.216.0/24 Transit: 20278 NEXEON, US 23.141.0.0/24 Origin: 395350 RESERVED, ZZ 23.141.0.0/24 Transit: 11426 TWC-11426-CAROLINAS, US 23.142.24.0/24 Origin: 62164 HEYMMAN-2, CA 23.142.24.0/24 Transit: 64236 UNREAL-SERVERS, US 23.147.224.0/24 Origin: 27392 639-DATACENTERS, US 23.147.224.0/24 Transit: 3356 LEVEL3, US Complete listing at https://thyme.apnic.net/current/data-add-IANA Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:16 /9:14 /10:41 /11:92 /12:298 /13:579 /14:1200 /15:2132 /16:13815 /17:8294 /18:13582 /19:24778 /20:44797 /21:52311 /22:112532 /23:103109 /24:616205 /25:792 /26:0 /27:0 /28:0 /29:0 /30:0 /31:0 /32:0 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 8151 6544 12321 UNINET, MX 12479 6529 7568 UNI2-AS, ES 11492 3595 4795 CABLEONE, US 39891 3489 4798 ALJAWWALSTC-AS, SA 6327 3440 3644 SHAW, CA 7155 2818 3859 VIASAT-SP-BACKBONE, US 22773 2489 3336 ASN-CXA-ALL-CCI-22773-RDC, US 16509 2341 13769 AMAZON-02, US 30036 2295 2637 MEDIACOM-ENTERPRISE-BUSINESS, US 10620 2195 3475 Telmex Colombia S.A., CO Complete listing at https://thyme.apnic.net/current/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:1779 2:1504 3:874 4:10 5:4702 6:157 7:6 8:1565 9:2 11:172 12:1336 13:468 14:2622 15:368 16:286 17:379 18:898 20:563 21:4 22:188 23:7766 24:2655 25:2 27:2734 29:19 31:3369 32:38 33:1 34:80 35:262 36:4222 37:4581 38:9535 39:967 40:251 41:4256 42:938 43:2675 44:377 45:18636 46:5086 47:340 49:1892 50:2049 51:589 52:1550 54:324 55:1111 56:11 57:274 58:2103 59:1349 60:1174 61:2890 62:3015 63:1786 64:5565 65:2147 66:4766 67:3090 68:1072 69:3897 70:1039 71:627 72:2861 74:2815 75:1506 76:610 77:2789 78:1898 79:1735 80:2220 81:2072 82:3221 83:1440 84:1925 85:3463 86:1109 87:2391 88:1314 89:4436 90:774 91:8417 92:2749 93:2956 94:4118 95:4429 96:1451 97:311 98:955 99:702 100:71 101:1221 102:3895 103:32238 104:5278 105:758 106:876 107:2654 108:1265 109:4195 110:2239 111:3575 112:2420 113:1579 114:1981 115:2154 116:2073 117:2680 118:2454 119:1944 120:2202 121:1382 122:2813 123:2242 124:1723 125:2913 126:91 128:1592 129:976 130:1305 131:2039 132:784 133:450 134:1589 135:355 136:1471 137:1189 138:2812 139:1595 140:1629 141:1531 142:1923 143:1954 144:1186 145:575 146:2181 147:2065 148:2703 149:2946 150:1280 151:2307 152:2099 153:526 154:7636 155:1863 156:3090 157:1929 158:1374 159:2529 160:3581 161:1905 162:3884 163:2246 164:1879 165:2453 166:1536 167:2025 168:3876 169:782 170:5189 171:999 172:4227 173:3400 174:913 175:1316 176:3737 177:4752 178:3970 179:2313 180:2587 181:4156 182:3589 183:2003 184:2074 185:21601 186:5213 187:4665 188:4269 189:4379 190:9516 191:1495 192:11362 193:9484 194:7787 195:5615 196:3288 197:3188 198:6242 199:8618 200:8211 201:6382 202:10604 203:10609 204:4614 205:3663 206:4559 207:3648 208:4283 209:5165 210:4912 211:2744 212:4595 213:3837 214:1028 215:50 216:6783 217:3275 218:1476 219:566 220:2150 221:1209 222:873 223:2796 End of report

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Spoofer Report for NANOG for Jul 2025
by CAIDA Spoofer Project 08 Aug '25

08 Aug '25

In response to feedback from operational security communities, CAIDA's source address validation measurement project (https://spoofer.caida.org) is automatically generating monthly reports of ASes originating prefixes in BGP for systems from which we received packets with a spoofed source address. We are publishing these reports to network and security operations lists in order to ensure this information reaches operational contacts in these ASes. This report summarises tests conducted within usa, can. Inferred improvements during Jul 2025: none inferred Source Address Validation issues inferred during Jul 2025: ASN Name First-Spoofed Last-Spoofed 40676 AS40676 2016-08-29 2025-07-31 27364 ACS-INTERNET 2016-09-27 2025-07-18 63296 AWBROADBAND 2017-09-01 2025-07-31 22883 CONDENAST 2019-05-29 2025-07-30 21804 ACCESS-SK 2019-06-09 2025-07-30 22773 ASN-CXA-ALL-CCI-22773-RDC 2021-10-24 2025-07-30 26231 SFIA-ASN 2021-10-27 2025-07-26 12183 TALKIE-COMMUNICATIONS 2022-12-10 2025-07-30 400282 2023-04-27 2025-07-30 393577 SCCNET 2023-05-03 2025-07-31 61461 Airtek Solutions C.A. 2023-05-13 2025-07-31 20119 ARROW 2023-10-19 2025-07-25 394684 WISPERNET 2024-01-17 2025-07-25 27425 ASN-IDK-27425 2024-02-21 2025-07-17 393530 TLU 2024-05-22 2025-07-26 19935 CRRS 2024-05-29 2025-07-21 27523 DMB-ASN 2024-11-15 2025-07-30 54334 ROYA 2025-03-13 2025-07-30 273843 2025-04-02 2025-07-30 Further information for these tests where we received spoofed packets is available at: https://spoofer.caida.org/recent_tests.php?country_include=usa,can&no_block… Please send any feedback or suggestions to spoofer-info(a)caida.org

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