July 2025 - NANOG - lists.nanog.org

Weekly Global IPv4 Routing Table Report
by Routing Table Analysis Role Account 04 Jul '25

04 Jul '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 05 Jul, 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: 988983 Prefixes after maximum aggregation (per Origin AS): 382804 Deaggregation factor: 2.58 Unique aggregates announced (without unneeded subnets): 485707 Number of IPv4 prefixes with a valid ROA: 548481 Number of IPv4 prefixes with an invalid ROA: 1477 Number of IPv4 prefixes with no ROA: 439025 Total ASes present in the Internet Routing Table: 77006 Prefixes per ASN: 12.84 Origin-only ASes present in the Internet Routing Table: 65899 Origin ASes announcing only one prefix: 26893 Transit ASes present in the Internet Routing Table: 11107 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: 80 Max AS path prepend of ASN ( 37447) 75 Prefixes from unregistered ASNs in the Routing Table: 1108 Number of instances of unregistered ASNs: 1152 Number of 32-bit ASNs allocated by the RIRs: 46774 Number of 32-bit ASNs visible in the Routing Table: 38509 Prefixes from 32-bit ASNs in the Routing Table: 205154 Number of bogon 32-bit ASNs visible in the Routing Table: 116 Special use prefixes present in the Routing Table: 1 Prefixes being announced from unallocated address space: 425 Number of addresses announced to Internet: 3106585216 Equivalent to 185 /8s, 42 /16s and 186 /24s Percentage of available address space announced: 83.9 Percentage of allocated address space announced: 83.9 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: 323324 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 261295 Total APNIC prefixes after maximum aggregation: 78100 APNIC Deaggregation factor: 3.35 Prefixes being announced from the APNIC address blocks: 252209 Unique aggregates announced from the APNIC address blocks: 104610 APNIC Region origin ASes present in the Internet Routing Table: 14709 APNIC Prefixes per ASN: 17.15 APNIC Region origin ASes announcing only one prefix: 4478 APNIC Region transit ASes present in the Internet Routing Table: 1967 Average APNIC Region AS path length visible: 5.5 Max APNIC Region AS path length visible: 78 Number of APNIC region 32-bit ASNs visible in the Routing Table: 10221 Number of APNIC addresses announced to Internet: 749655296 Equivalent to 44 /8s, 174 /16s and 213 /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: 290779 Total ARIN prefixes after maximum aggregation: 131873 ARIN Deaggregation factor: 2.20 Prefixes being announced from the ARIN address blocks: 292218 Unique aggregates announced from the ARIN address blocks: 140600 ARIN Region origin ASes present in the Internet Routing Table: 19236 ARIN Prefixes per ASN: 15.19 ARIN Region origin ASes announcing only one prefix: 7019 ARIN Region transit ASes present in the Internet Routing Table: 2001 Average ARIN Region AS path length visible: 4.6 Max ARIN Region AS path length visible: 34 Number of ARIN region 32-bit ASNs visible in the Routing Table: 5239 Number of ARIN addresses announced to Internet: 1349161728 Equivalent to 80 /8s, 106 /16s and 147 /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: 276063 Total RIPE prefixes after maximum aggregation: 135650 RIPE Deaggregation factor: 2.04 Prefixes being announced from the RIPE address blocks: 274916 Unique aggregates announced from the RIPE address blocks: 176980 RIPE Region origin ASes present in the Internet Routing Table: 28925 RIPE Prefixes per ASN: 9.50 RIPE Region origin ASes announcing only one prefix: 12035 RIPE Region transit ASes present in the Internet Routing Table: 4015 Average RIPE Region AS path length visible: 5.2 Max RIPE Region AS path length visible: 69 Number of RIPE region 32-bit ASNs visible in the Routing Table: 12520 Number of RIPE addresses announced to Internet: 731356544 Equivalent to 43 /8s, 151 /16s and 157 /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: 124524 Total LACNIC prefixes after maximum aggregation: 29758 LACNIC Deaggregation factor: 4.18 Prefixes being announced from the LACNIC address blocks: 120954 Unique aggregates announced from the LACNIC address blocks: 48998 LACNIC Region origin ASes present in the Internet Routing Table: 11282 LACNIC Prefixes per ASN: 10.72 LACNIC Region origin ASes announcing only one prefix: 2669 LACNIC Region transit ASes present in the Internet Routing Table: 2543 Average LACNIC Region AS path length visible: 5.9 Max LACNIC Region AS path length visible: 75 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 9242 Number of LACNIC addresses announced to Internet: 171231488 Equivalent to 10 /8s, 52 /16s and 201 /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: 35214 Total AfriNIC prefixes after maximum aggregation: 6692 AfriNIC Deaggregation factor: 5.26 Prefixes being announced from the AfriNIC address blocks: 48261 Unique aggregates announced from the AfriNIC address blocks: 14138 AfriNIC Region origin ASes present in the Internet Routing Table: 1925 AfriNIC Prefixes per ASN: 25.07 AfriNIC Region origin ASes announcing only one prefix: 692 AfriNIC Region transit ASes present in the Internet Routing Table: 380 Average AfriNIC Region AS path length visible: 6.1 Max AfriNIC Region AS path length visible: 80 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1287 Number of AfriNIC addresses announced to Internet: 104934912 Equivalent to 6 /8s, 65 /16s and 46 /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 11627 8760 119 CHINAMOBILE-CN China Mobile Communication 7545 6146 840 622 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 4813 4192 76 ERX-CERNET-BKB China Education and Resear 9498 4456 536 314 BBIL-AP BHARTI Airtel Ltd., IN 7552 3912 1332 27 VIETEL-AS-AP Viettel Group, VN 7713 3700 1044 66 TELKOMNET-AS-AP PT Telekomunikasi Indones 45899 3299 1869 103 VNPT-AS-VN VNPT Corp, VN 24560 2903 862 528 AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., 56046 2431 812 181 CMNET-JIANGSU-AP China Mobile communicati 4766 2322 11519 609 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 13585 40948 5220 AMAZON-02, US 11492 4781 317 604 CABLEONE, US 7155 3857 286 85 VIASAT-SP-BACKBONE, US 6327 3638 1320 82 SHAW, CA 174 3408 8766 854 COGENT-174, US 22773 3337 3032 165 ASN-CXA-ALL-CCI-22773-RDC, US 749 3226 54767 2477 DNIC-AS-00749, US 396982 3194 3854 431 GOOGLE-CLOUD-PLATFORM, US 16625 2967 1243 2206 AKAMAI-AS, US 4155 2840 215 1728 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 7655 1713 148 UNI2-AS, ES 39891 4798 293 63 ALJAWWALSTC-AS, SA 20940 3941 3395 127 AKAMAI-ASN1, NL 9009 3775 351 2105 M247, RO 12389 3126 2305 884 ROSTELECOM-AS PJSC Rostelecom. Technical 34984 2403 361 583 TELLCOM-AS, TR 212238 2360 169 1728 CDNEXT, GB 13188 1606 100 34 TRIOLAN, UA 8452 1579 1852 14 TE-AS TE-AS, EG 8551 1430 366 39 BEZEQ-INTERNATIONAL-AS Bezeqint Internet 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 12256 3259 576 UNINET, MX 10620 3509 481 1020 Telmex Colombia S.A., CO 13999 2539 538 356 Mega Cable, S.A. de C.V., MX 11830 1986 369 64 Instituto Costarricense de Electricidad y 28573 1368 2435 268 Claro NXT Telecomunicacoes Ltda, BR 3816 1344 787 205 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC, 6147 1195 371 22 Telefonica del Peru S.A.A., PE 11664 1186 278 33 Techtel LMDS Comunicaciones Interactivas 22884 1061 67 370 TOTAL PLAY TELECOMUNICACIONES SA DE CV, M 6503 1022 373 162 Axtel, S.A.B. de C.V., MX 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 1823 660 28 RAYA-AS, EG 24863 1619 389 16 LINKdotNET-AS, EG 29571 1607 102 33 ORANGE-COTE-IVOIRE, CI 36992 1424 1481 287 ETISALAT-MISR, EG 36903 1249 554 96 MT-MPLS, MA 37069 1108 1100 18 MOBINIL, EG 36935 1061 520 44 Vodafone-, EG 20011 568 154 212 INTERNET-SOLUTIONS, ZA 36914 556 82 3 KENET-AS, KE 15399 543 57 60 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 13585 40948 5220 AMAZON-02, US 8151 12256 3259 576 UNINET, MX 9808 11627 8760 119 CHINAMOBILE-CN China Mobile Communication 12479 7655 1713 148 UNI2-AS, ES 7545 6146 840 622 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 4813 4192 76 ERX-CERNET-BKB China Education and Resear 39891 4798 293 63 ALJAWWALSTC-AS, SA 11492 4781 317 604 CABLEONE, US 9498 4456 536 314 BBIL-AP BHARTI Airtel Ltd., IN 20940 3941 3395 127 AKAMAI-ASN1, NL Complete listing at https://thyme.apnic.net/current/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 8151 12256 11680 UNINET, MX 9808 11627 11508 CHINAMOBILE-CN China Mobile Communications Grou 12479 7655 7507 UNI2-AS, ES 7545 6146 5524 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 4813 4737 ERX-CERNET-BKB China Education and Research Net 39891 4798 4735 ALJAWWALSTC-AS, SA 11492 4781 4177 CABLEONE, US 9498 4456 4142 BBIL-AP BHARTI Airtel Ltd., IN 7552 3912 3885 VIETEL-AS-AP Viettel Group, VN 20940 3941 3814 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 22542 UNALLOCATED 8.7.205.0/24 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 393266 UNALLOCATED 8.23.52.0/24 46887 CROWNCASTLE-AS46887, US 396894 UNALLOCATED 8.28.201.0/24 46887 CROWNCASTLE-AS46887, 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 33132 CROWNCASTLE-AS33132, 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: 6939 HURRICANE, 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 23.147.240.0/24 Origin: 32302 RESERVED, ZZ 23.147.240.0/24 Transit: 32787 PROLEXIC-TECHNOLOGIES-DDOS-MITIGATION-NE 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 /11:91 /12:297 /13:581 /14:1201 /15:2132 /16:13800 /17:8302 /18:13587 /19:24754 /20:44835 /21:52294 /22:112423 /23:102960 /24:610862 /25:793 /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 12479 6578 7655 UNI2-AS, ES 8151 6462 12256 UNINET, MX 11492 3577 4781 CABLEONE, US 39891 3489 4798 ALJAWWALSTC-AS, SA 6327 3433 3638 SHAW, CA 7155 2816 3857 VIASAT-SP-BACKBONE, US 22773 2491 3337 ASN-CXA-ALL-CCI-22773-RDC, US 16509 2342 13585 AMAZON-02, US 30036 2263 2604 MEDIACOM-ENTERPRISE-BUSINESS, US 10620 2196 3509 Telmex Colombia S.A., CO Complete listing at https://thyme.apnic.net/current/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:1746 2:1513 3:830 4:10 5:4689 6:162 7:6 8:1596 9:1 11:172 12:1345 13:447 14:2581 15:363 16:285 17:384 18:892 20:555 21:4 22:188 23:7681 24:2672 25:2 27:2721 29:19 31:3311 32:38 33:1 34:80 35:257 36:3286 37:4583 38:9396 39:909 40:229 41:4297 42:924 43:2637 44:373 45:18633 46:5125 47:328 49:1892 50:1891 51:591 52:1554 54:321 55:1103 56:11 57:273 58:2120 59:1347 60:1173 61:2799 62:2923 63:1799 64:5509 65:2173 66:4698 67:3073 68:1089 69:3872 70:1051 71:619 72:2857 74:2783 75:1505 76:611 77:2778 78:1886 79:1734 80:2215 81:2073 82:3174 83:1449 84:1881 85:3465 86:1086 87:2385 88:1313 89:4404 90:776 91:8389 92:2749 93:2937 94:4073 95:4379 96:1446 97:311 98:958 99:692 100:72 101:1191 102:3840 103:32254 104:5222 105:756 106:978 107:2640 108:1267 109:4140 110:2244 111:3302 112:2186 113:1570 114:1969 115:2129 116:2064 117:2552 118:2452 119:1943 120:2122 121:1378 122:2803 123:2216 124:1664 125:2903 126:91 128:1591 129:964 130:1295 131:2041 132:778 133:450 134:1565 135:349 136:1387 137:1180 138:2812 139:1574 140:1637 141:1511 142:1918 143:1960 144:1173 145:556 146:2178 147:2106 148:2699 149:2933 150:1265 151:2184 152:2089 153:524 154:7703 155:1773 156:3178 157:1920 158:1340 159:2508 160:3591 161:1854 162:3865 163:2215 164:1867 165:2046 166:1513 167:2000 168:3975 169:778 170:5125 171:1006 172:4428 173:3362 174:921 175:1312 176:3712 177:4760 178:3910 179:2312 180:2595 181:4101 182:3488 183:1878 184:2079 185:21621 186:5193 187:4613 188:4257 189:4328 190:9577 191:1459 192:11314 193:9487 194:7775 195:5576 196:3305 197:3230 198:6196 199:8567 200:8226 201:6387 202:10525 203:10582 204:4598 205:3663 206:4469 207:3631 208:4264 209:5153 210:4858 211:2656 212:4594 213:3814 214:1014 215:46 216:6758 217:3194 218:1418 219:561 220:2141 221:1152 222:846 223:2571 End of report

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Take Advantage of Early Bird Pricing! N94 Pics Have Been Published! + More!
by Nanog News 03 Jul '25

03 Jul '25

*** Take Advantage of Early Bird Pricing!* ------------------------------------------------------------ *Early Bird Pricing will End Monday, July 14* ****Please Note Important Room Block Information: *Access to the room block is restricted to registered attendees only. More info here. ( https://nanog.org/events/nanog-95/venue/) REGISTER NOW (https://nanog.org/events/nanog-95/register/) *** N94 Pics Are Ready!* ------------------------------------------------------------ *Make Your Own NANOG 94 Photo Album* All pictures from NANOG 94 are now available to view and download! VIEW N94 ALBUM! (https://www.flickr.com/photos/nanog/albums) *** Sponsorships are Available for N95!* ------------------------------------------------------------ *Invest in the Community That We Have Built* *\*For more information, please email Shawn Winstead, NANOG Sponsorship Sales at swinstead(a)nanog.org. *** Happy 4th of July From NANOG!* ------------------------------------------------------------ Tomorrow, we will honor the birth of the United States of America's independence; a reminder of the courage, collaboration, and vision it takes to build something lasting. To the engineers, technologists, and innovators who help shape and secure the Internet: thank you for carrying that spirit forward and wishing our community a safe, meaningful, and well-connected Independence Day. *** 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

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Small DC\Colo
by Mike Hammett 03 Jul '25

03 Jul '25

I've been asked to market a small DC\colo. What are some low-effort ways of accomplishing this? Is there a Connectbase for colo? ----- Mike Hammett Intelligent Computing Solutions Midwest Internet Exchange The Brothers WISP

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address fragmentation
by Lu Heng 03 Jul '25

03 Jul '25

Dear NANOG community, With the increasing prevalence of address‐space leasing—effectively operating as “mini‐RIRs” for IP distribution—fragmentation of address blocks has become a critical concern. How are network operators and registry practitioners today tackling the challenge of fragmentation in IP address allocation? - Are there any comprehensive research studies or white papers that survey fragmentation mitigation techniques or propose novel allocation algorithms? - What best operational practices have emerged for assigning large, contiguous prefixes (e.g. /16) rather than multiple smaller blocks (e.g. /18s) across diverse networks? - How do operators handle geo‐locational constraints and customer reluctance to renumber when reassigning addresses across multiple regions or networks? Any insights, references, or case studies you can share would be greatly appreciated. -- -- Kind regards. Lu

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We're Back! Outages mailing is now open!
by virendra rode 01 Jul '25

01 Jul '25

Hi all, We know the wait has been longer than expected and we sincerely thank you for your patience and support. After a lot of hard work behind the scenes, we're thrilled to finally announce that outages mailing list is live at its new home at Packet Clearing House. Please see below instructions for subscription. This launch would not have been possible without the generous donation of time and resources from Bill Woodcock and his dedicated team (Robin McNeill, Andras, Kabindra Shrestha and others who I may have missed) who worked tirelessly to set up the infrastructure. I would also like to thank Bryan Fields for his expertise in Mailman3, which ensured that outages mailman3 platform met the NANOG best practices standard. Their hard work truly made all the difference. Thank you to the community for sticking with us. ++++++++++++++++++ Sign up for an account https://lists.outages.org/accounts/signup/ To subscribe send an email to outages-join(a)outages.org To unsubscribe send an email to outages-leave(a)outages.org To contact the list owners outages-owner(a)outages.org Archives https://lists.outages.org/archives/list/outages@outages.org/ ++++++++++++++++++ With gratitude, virendra rode

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