January 2026 - NANOG - lists.nanog.org

The web beneath our waves - undersea cables book
by Suresh Ramasubramanian 28 Jan '26

28 Jan '26

I just realised that this book my old friend Samanth Subramanian was working on came out last year. Been a long time since the last book I heard of on this subject. https://lareviewofbooks.org/article/power-hangs-by-a-literal-thread/ --srs

5 7

When it even happens to the best of us
by Hank Nussbacher 27 Jan '26

27 Jan '26

https://blog.cloudflare.com/route-leak-incident-january-22-2026/ -Hank

4 3

BGP Vortex: Internet Routing Vortices Create Outages by Preventing Convergence
by Hank Nussbacher 26 Jan '26

26 Jan '26

https://pulse.internetsociety.org/blog/bgp-vortex-internet-routing-vortices… -Hank

1 0

N96 is Only one Week Away-Attendees Dont Forget This
by Nanog Marketing 23 Jan '26

23 Jan '26

*** N96 Attendees: Don't Forget to Pre-Register for the Workshop!* ------------------------------------------------------- *-----"From Models to Operations: Understanding Autonomous Agents in Networking"* This hands-on workshop is limited to 50 attendees. Pre-registration is required. Once you are registered, please review the pre-requisite preparations page ( https://nanog.org/events/n96-models-to-operations-workshop/pre-requisites/) to ensure you ready to roll on February 3rd. MORE INFO (https://nanog.org/events/n96-models-to-operations-workshop/) https://nanog.org/events/nanog-96/socials/ *** Galentine’s, but Make It Technical* ------------------------------------------------------------ *Women in Tech will Kick Off N96 on Sunday, Feb 1 at 5 pm* Skip the awkward networking and scripted small talk. Join us for "Galentine’s Day," Women in Tech edition, where you can show some love to the women who keep the networks running. No corporate buzzwords. No posturing. Just smart women, real insight, and a little professional love, NANOG-style. 💘 📅 Sunday, Feb. 1 at 5 pm 📍 Seacliff Room, Hyatt San Francisco MORE INFO (https://nanog.org/events/nanog-96/socials/) *** SONiC-VPP and the Power of the Open Source, or…* ------------------------------------------------------------ *How 4,000 Contributors Built “The Inexpensive Glue” Holding Your Network Together* At NANOG, attendees get an inside look at the work shaping real-world networks. At our last conference, one standout example was SONiC-VPP. The session was led by Murali Venkat, a principal engineer at Cisco + Yue Gao (Fred), a software engineer on the project. Click below to learn more. Want to dig even deeper into SONiC-VPP and the work happening at scale? Act fast! NANOG 96 is a little over a week away! Registration is still open ( https://nanog.org/events/nanog-96/register/) for both in-person and virtual attendees. READ MORE ( https://nanog.org/stories/industry-news/sonic-vpp-and-the-power-of-the-open… ) * ** NANOG Socials: Don't Miss Where the Real Conversations Happen--------------------------*----------------------------- *-----Sync Your Calendars to Not Miss our Signature Social, Beer 'N Gear + More!* Some of the most valuable conversations at NANOG don’t happen on stage. They happen over a drink. In a corner of the room. Mid-sentence when someone says, “We ran into the same issue.” LEARN MORE (https://nanog.org/events/nanog-96/socials/) * ** 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 eadrolet(a)nanog.org <lbrooks(a)nanog.org> | +1 866-902-1336 | www.nanog.org NANOG | 305 E. Eisenhower Pkwy, Suite 100 | Ann Arbor, MI 48108, USA ASN# 19230

1 0

Weekly Global IPv4 Routing Table Report
by Routing Table Analysis Role Account 23 Jan '26

23 Jan '26

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 24 Jan, 2026 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: 1029957 Prefixes after maximum aggregation (per Origin AS): 396075 Deaggregation factor: 2.60 Unique aggregates announced (without unneeded subnets): 507988 Number of IPv4 prefixes with a valid ROA: 609259 Number of IPv4 prefixes with an invalid ROA: 1524 Number of IPv4 prefixes with no ROA: 419174 Total ASes present in the Internet Routing Table: 77820 Prefixes per ASN: 13.24 Origin-only ASes present in the Internet Routing Table: 66875 Origin ASes announcing only one prefix: 27195 Transit ASes present in the Internet Routing Table: 10945 Transit-only ASes present in the Internet Routing Table: 541 Average AS path length visible in the Internet Routing Table: 4.7 Max AS path length visible: 209 Max AS path prepend of ASN (214570) 200 Prefixes from unregistered ASNs in the Routing Table: 1071 Number of instances of unregistered ASNs: 1110 Number of 32-bit ASNs allocated by the RIRs: 48484 Number of 32-bit ASNs visible in the Routing Table: 39705 Prefixes from 32-bit ASNs in the Routing Table: 220983 Number of bogon 32-bit ASNs visible in the Routing Table: 113 Special use prefixes present in the Routing Table: 1 Prefixes being announced from unallocated address space: 476 Number of addresses announced to Internet: 3107385984 Equivalent to 185 /8s, 54 /16s and 242 /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: 335794 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 281113 Total APNIC prefixes after maximum aggregation: 82399 APNIC Deaggregation factor: 3.41 Prefixes being announced from the APNIC address blocks: 267306 Unique aggregates announced from the APNIC address blocks: 106940 APNIC Region origin ASes present in the Internet Routing Table: 15027 APNIC Prefixes per ASN: 17.79 APNIC Region origin ASes announcing only one prefix: 4604 APNIC Region transit ASes present in the Internet Routing Table: 1976 Average APNIC Region AS path length visible: 4.7 Max APNIC Region AS path length visible: 42 Number of APNIC region 32-bit ASNs visible in the Routing Table: 10582 Number of APNIC addresses announced to Internet: 754797056 Equivalent to 44 /8s, 253 /16s and 74 /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: 301736 Total ARIN prefixes after maximum aggregation: 135438 ARIN Deaggregation factor: 2.23 Prefixes being announced from the ARIN address blocks: 301616 Unique aggregates announced from the ARIN address blocks: 146224 ARIN Region origin ASes present in the Internet Routing Table: 19391 ARIN Prefixes per ASN: 15.55 ARIN Region origin ASes announcing only one prefix: 7061 ARIN Region transit ASes present in the Internet Routing Table: 1918 Average ARIN Region AS path length visible: 4.3 Max ARIN Region AS path length visible: 28 Number of ARIN region 32-bit ASNs visible in the Routing Table: 5446 Number of ARIN addresses announced to Internet: 1344124416 Equivalent to 80 /8s, 29 /16s and 182 /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: 283129 Total RIPE prefixes after maximum aggregation: 140068 RIPE Deaggregation factor: 2.02 Prefixes being announced from the RIPE address blocks: 285031 Unique aggregates announced from the RIPE address blocks: 184980 RIPE Region origin ASes present in the Internet Routing Table: 29153 RIPE Prefixes per ASN: 9.78 RIPE Region origin ASes announcing only one prefix: 12110 RIPE Region transit ASes present in the Internet Routing Table: 3977 Average RIPE Region AS path length visible: 4.8 Max RIPE Region AS path length visible: 209 Number of RIPE region 32-bit ASNs visible in the Routing Table: 12945 Number of RIPE addresses announced to Internet: 734182784 Equivalent to 43 /8s, 194 /16s and 189 /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: 126469 Total LACNIC prefixes after maximum aggregation: 30528 LACNIC Deaggregation factor: 4.14 Prefixes being announced from the LACNIC address blocks: 122100 Unique aggregates announced from the LACNIC address blocks: 49830 LACNIC Region origin ASes present in the Internet Routing Table: 11357 LACNIC Prefixes per ASN: 10.75 LACNIC Region origin ASes announcing only one prefix: 2679 LACNIC Region transit ASes present in the Internet Routing Table: 2526 Average LACNIC Region AS path length visible: 5.3 Max LACNIC Region AS path length visible: 69 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 9352 Number of LACNIC addresses announced to Internet: 170604288 Equivalent to 10 /8s, 43 /16s and 55 /24s LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 61440-61951, 64099-64197, 262144-275868 + 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: 36439 Total AfriNIC prefixes after maximum aggregation: 6947 AfriNIC Deaggregation factor: 5.25 Prefixes being announced from the AfriNIC address blocks: 53428 Unique aggregates announced from the AfriNIC address blocks: 19609 AfriNIC Region origin ASes present in the Internet Routing Table: 2018 AfriNIC Prefixes per ASN: 26.48 AfriNIC Region origin ASes announcing only one prefix: 741 AfriNIC Region transit ASes present in the Internet Routing Table: 385 Average AfriNIC Region AS path length visible: 5.3 Max AfriNIC Region AS path length visible: 42 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1380 Number of AfriNIC addresses announced to Internet: 103390208 Equivalent to 6 /8s, 41 /16s and 156 /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 13606 8945 102 CHINAMOBILE-CN China Mobile Communication 7545 6026 833 575 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 5029 4193 77 ERX-CERNET-BKB China Education and Resear 9498 4719 543 339 BBIL-AP BHARTI Airtel Ltd., IN 7552 4050 1332 29 VIETEL-AS-AP Viettel Group, VN 7713 3732 1044 65 TELKOMNET-AS-AP PT Telekomunikasi Indones 56046 3420 831 184 CMNET-JIANGSU-AP China Mobile communicati 45899 3332 1868 98 VNPT-AS-VN VNPT Corp, VN 17561 3193 200 621 LCS-AS-AP LARUS Limited, HK 24560 2963 864 512 AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., 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 14003 38810 5447 AMAZON-02 - Amazon.com, Inc., US 22773 4778 3115 366 ASN-CXA-ALL-CCI-22773-RDC - Cox Communica 11492 4638 308 1020 CABLEONE - CABLE ONE, INC., US 7155 3858 286 85 VIASAT-SP-BACKBONE - ViaSat,Inc., US 6327 3699 1321 71 SHAW - Shaw Communications, CA 396982 3329 4868 499 GOOGLE-CLOUD-PLATFORM - Google LLC, US 174 3184 8768 848 COGENT-174 - Cogent Communications, LLC, 749 3142 54729 2393 DNIC-AS-00749 - United States Department 16625 2819 1209 2121 AKAMAI-AS - Akamai Technologies, Inc., US 36352 2702 222 893 AS-COLOCROSSING - HostPapa, 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 7238 1711 149 UNI2-AS, ES 39891 4969 306 72 ALJAWWALSTC-AS, SA 9009 3914 366 2239 M247, RO 20940 3832 3393 112 AKAMAI-ASN1, NL 12389 3176 2317 871 ROSTELECOM-AS PJSC Rostelecom. Technical 212238 2559 182 1856 CDNEXT, GB 34984 2425 364 577 TELLCOM-AS, TR 8452 1712 1852 14 TE-AS TE-AS, EG 203020 1609 242 782 HOSTROYALE, IN 13188 1607 100 27 TRIOLAN, UA 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 12672 3304 603 UNINET, MX 10620 3445 457 1107 Telmex Colombia S.A., CO 13999 2483 508 351 Mega Cable, S.A. de C.V., MX 11830 1991 369 65 Instituto Costarricense de Electricidad y 11664 1389 278 33 Techtel LMDS Comunicaciones Interactivas 28573 1375 2430 272 Claro NXT Telecomunicacoes Ltda, BR 3816 1339 770 213 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC, 6147 1258 371 22 INTEGRATEL PERU S.A.A., PE 22884 1056 67 358 TOTAL PLAY TELECOMUNICACIONES SA DE CV, M 26615 1016 2486 56 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 1983 646 33 RAYA-AS, EG 36992 1842 1532 339 ETISALAT-MISR, EG 24863 1282 389 16 LINKdotNET-AS, EG 36903 1232 555 98 MT-MPLS, MA 36935 1126 520 42 Vodafone-, EG 37069 1117 1112 11 MOBINIL, EG 29571 1070 78 20 ORANGE-COTE-IVOIRE, CI 20011 580 154 212 NTT-DATA-Inc, ZA 328608 573 49 167 Africa-on-Cloud-AS, ZA 36914 569 82 3 KENET-AS, 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 14003 38810 5447 AMAZON-02 - Amazon.com, Inc., US 9808 13606 8945 102 CHINAMOBILE-CN China Mobile Communication 8151 12672 3304 603 UNINET, MX 12479 7238 1711 149 UNI2-AS, ES 7545 6026 833 575 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 5029 4193 77 ERX-CERNET-BKB China Education and Resear 39891 4969 306 72 ALJAWWALSTC-AS, SA 22773 4778 3115 366 ASN-CXA-ALL-CCI-22773-RDC - Cox Communica 9498 4719 543 339 BBIL-AP BHARTI Airtel Ltd., IN 11492 4638 308 1020 CABLEONE - CABLE ONE, INC., US Complete listing at https://thyme.apnic.net/current/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 9808 13606 13504 CHINAMOBILE-CN China Mobile Communications Grou 8151 12672 12069 UNINET, MX 12479 7238 7089 UNI2-AS, ES 7545 6026 5451 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 5029 4952 ERX-CERNET-BKB China Education and Research Net 39891 4969 4897 ALJAWWALSTC-AS, SA 22773 4778 4412 ASN-CXA-ALL-CCI-22773-RDC - Cox Communications 9498 4719 4380 BBIL-AP BHARTI Airtel Ltd., IN 7552 4050 4021 VIETEL-AS-AP Viettel Group, VN 7155 3858 3773 VIASAT-SP-BACKBONE - ViaSat,Inc., US 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 393266 UNALLOCATED 8.23.52.0/24 46887 CROWNCASTLE-AS46887 - C 396894 UNALLOCATED 8.28.201.0/24 3356 LEVEL3 - Level 3 Parent 394936 UNALLOCATED 8.33.224.0/24 22442 HOU-PHONOSCOPE - Phonos 395195 UNALLOCATED 8.38.115.0/24 3356 LEVEL3 - Level 3 Parent 1782 UNALLOCATED 8.42.19.0/24 3356 LEVEL3 - Level 3 Parent 13342 UNALLOCATED 12.17.5.0/24 174 COGENT-174 - Cogent Com 26345 UNALLOCATED 12.21.93.0/24 40264 TWC-40264-WI-MN-UPPERMI 396831 UNALLOCATED 12.23.198.0/24 7018 ATT-INTERNET4 - AT&T En 395476 UNALLOCATED 12.36.194.0/24 7018 ATT-INTERNET4 - AT&T En 395476 UNALLOCATED 12.36.195.0/24 3356 LEVEL3 - Level 3 Parent 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 - Hurricane Electric LLC, US Complete listing at https://thyme.apnic.net/current/data-spar Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 23.137.48.0/24 Origin: 16904 ARVIG-16904 - Arvig Enterprises Inc., US 23.137.48.0/24 Transit: 3257 GTT-BACKBONE GTT, US 23.137.200.0/24 Origin: 16276 OVH, FR 23.137.200.0/24 Transit: 2516 KDDI KDDI CORPORATION, JP 23.140.216.0/24 Origin: 27176 DATAWAGON - DataWagon LLC, US 23.140.216.0/24 Transit: 20278 NEXEON - Nexeon Technologies, Inc., US 23.141.0.0/24 Origin: 395350 RESERVED, ZZ 23.141.0.0/24 Transit: 11426 TWC-11426-CAROLINAS - Charter Communicat 23.142.24.0/24 Origin: 62164 HEYMMAN-2, CA 23.142.24.0/24 Transit: 64236 UNREAL-SERVERS - UnReal Servers, LLC, 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 /10:40 /11:93 /12:302 /13:580 /14:1199 /15:2090 /16:13737 /17:8330 /18:13622 /19:25117 /20:45754 /21:52805 /22:113839 /23:106448 /24:645279 /25:692 /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 6832 12672 UNINET, MX 12479 6168 7238 UNI2-AS, ES 39891 3655 4969 ALJAWWALSTC-AS, SA 11492 3498 4638 CABLEONE - CABLE ONE, INC., US 6327 3479 3699 SHAW - Shaw Communications, CA 22773 3049 4778 ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US 7155 2817 3858 VIASAT-SP-BACKBONE - ViaSat,Inc., US 16509 2476 14003 AMAZON-02 - Amazon.com, Inc., US 30036 2305 2646 MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US 10620 2225 3445 Telmex Colombia S.A., CO Complete listing at https://thyme.apnic.net/current/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:1840 2:1521 3:962 4:9 5:4956 6:186 7:6 8:1528 9:14 11:172 12:1227 13:620 14:2675 15:415 16:179 17:391 18:917 20:597 21:4 22:188 23:8147 24:2632 25:2 27:2753 29:19 31:3431 32:32 34:81 35:292 36:4642 37:4530 38:9894 39:1256 40:439 41:4543 42:957 43:2907 44:417 45:19706 46:4955 47:403 48:20 49:2192 50:2064 51:599 52:1257 54:238 55:1132 56:11 57:311 58:2231 59:1423 60:1173 61:3111 62:3108 63:1772 64:6203 65:2128 66:6018 67:3257 68:1492 69:4193 70:1031 71:619 72:3096 74:2969 75:1514 76:608 77:2757 78:1922 79:1803 80:2319 81:2133 82:4039 83:1472 84:2026 85:3692 86:1105 87:2392 88:1344 89:4664 90:821 91:8400 92:2861 93:3013 94:4301 95:4527 96:1450 97:314 98:956 99:780 100:69 101:1511 102:4352 103:32333 104:5458 105:785 106:917 107:2823 108:1236 109:4246 110:2309 111:4113 112:3127 113:1704 114:2175 115:2238 116:2167 117:3307 118:2489 119:2110 120:2620 121:1579 122:2973 123:2305 124:1680 125:2987 126:125 128:1656 129:960 130:1571 131:2286 132:770 133:461 134:1622 135:539 136:1627 137:1349 138:2984 139:1608 140:1820 141:1560 142:2468 143:2173 144:1562 145:628 146:2201 147:2270 148:2807 149:2935 150:1323 151:2633 152:2280 153:850 154:9665 155:2305 156:4829 157:2247 158:1500 159:2757 160:3633 161:2005 162:4024 163:2333 164:1971 165:2634 166:1299 167:2213 168:3941 169:902 170:5477 171:1122 172:4569 173:3432 174:892 175:1346 176:3775 177:4744 178:4329 179:2288 180:3014 181:4390 182:3902 183:2540 184:2024 185:21698 186:5551 187:4857 188:4623 189:4460 190:9689 191:1539 192:11484 193:9512 194:7861 195:5697 196:3277 197:3196 198:6234 199:6122 200:8210 201:6401 202:10814 203:10563 204:4748 205:3782 206:4415 207:3972 208:4369 209:5471 210:5012 211:2783 212:4990 213:4055 214:1061 215:54 216:7141 217:3449 218:1675 219:591 220:2191 221:1314 222:1048 223:3281 End of report

1 0

Looking for a /16 ip space
by Brandon Z. 22 Jan '26

22 Jan '26

Hi all, I have a friend who is currently looking to buy a /16 IPv4 subnet. Please see the requirements below: - Preference: Transfer to RIPE. - Acceptable Regions: RIPE, APNIC, or ARIN blocks. Please reach out to me directly if you have an offer or any leads. On a side note, does anyone happen to know if Cogent sells legacy resources? Best regards, *Brandon Z.* HUIZE LTD www.huize.asia <https://huize.asia/>| www.ixp.su | Twitter This e-mail and any attachments or any reproduction of this e-mail in whatever manner are confidential and for the use of the addressee(s) only. HUIZE LTD can’t take any liability and guarantee of the text of the email message and virus.

3 2

Microsoft contact - emails being blocked from our app to our users
by Erik Levinson 21 Jan '26

21 Jan '26

Hello, does anyone have a Microsoft contact that could help with an email deliverability issue that started approximately two days ago? We (LeapAP) are seeing a large and increasing volume of mail errors from Microsoft, such as the below (XXXX is our dedicated IP at our ESP) and are unable to deliver mail to our users with the following destination domains (so it seems like the hosted Office 365 domains aren't impacted, but only the free/Outlook.com ones): hotmail.com hotmail.ca live.ca msn.com outlook.com live.com 4.7.650 The mail server [XXXX] has been temporarily rate limited due to IP reputation. For e-mail delivery information, see https://aka.ms/postmaster (S775) SNDS shows nothing abnormal for the IP address during the involved time period or earlier, but I can only see up to yesterday @ 18:00 PT there. We submitted the Microsoft form at https://olcsupport.office.com/ and have a ticket number as a result, which I can share as well. Appreciate the help as we're quite impacted and getting a lot of support tickets. Thanks Erik Levinson LeapAP

1 0

Apply Today for the ARIN 57 Fellowship Program
by John Sweeting 21 Jan '26

21 Jan '26

Hello NANOG, Please see the announcement below referencing ARIN's Fellowship Program. ________________________________ From: ARIN-announce <arin-announce-bounces(a)arin.net> on behalf of ARIN <info(a)arin.net> Sent: Thursday, January 8, 2026 10:26 AM To: arin-announce(a)arin.net Subject: Apply Today for the ARIN 57 Fellowship Program Interested in Internet governance, number resource policy, and getting involved in the ARIN community? Become an ARIN Fellow! Applications for the ARIN 57 Fellowship Program are now open, and we encourage you to apply for this specialized, interactive learning opportunity. https://www.arin.net/beafellow Applications are now being accepted through 26 January 2026.  What to Expect Selected Fellows will participate in virtual sessions before and after the ARIN 57 Public Policy and Members Meeting held 19-22 April 2026 in Louisville, Kentucky, and online. Fellows may attend ARIN 57 either in person or virtually, as determined by the Fellowship Selection Committee. With the personal support from experienced ARIN community Mentors, Fellows will have the opportunity to: - Ask questions and receive feedback, - Gain the knowledge and confidence to join in community discussions and contribute new ideas, and - Become part of the future of Internet governance and policy in the ARIN region.  Who Should Apply Individuals who are 18 years of age or older and reside in the ARIN region (https://www.arin.net/about/welcome/region/) are eligible to apply if they have a demonstrated interest in the ARIN community and its Policy Development Process for the management of Internet number resources.   Applicants should understand the importance of ARIN’s mission and be familiar with ARIN services, the Internet number resources it manages, and the processes reflected in the Number Resource Policy Manual (NRPM) (https://www.arin.net/participate/policy/nrpm/)   To learn more about ARIN’s Fellowship Program, the selection process, and the Terms and Conditions, please visit ARIN’s Fellowship Program portal (https://www.arin.net/fellowships) Applicants can email fellowships(a)arin.net<mailto:fellowships@arin.net> for more information or to request a customizable letter to their employer that highlights the benefits of taking part in ARIN’s Fellowship Program.  ARIN looks forward to receiving your application soon!  Regards,  Amanda Gauldin Senior Project Manager American Registry for Internet Numbers (ARIN)

1 0

pingability of 2600::
by Marco Moock 20 Jan '26

20 Jan '26

Hello! Cogent operates a machine on 2600::. IIRC there was also a route to sprint for that net, but that seems to be gone. I can ping that via my ISP (AS8820) that uses Cogent as its current default uplink. Although, I cannot ping that from various other ISPs, e.g. HE AS6939 or DTAG 3320 (no route). Some other people reported issues years ago: https://www.reddit.com/r/ipv6/comments/1bzfqzn/2600_is_no_longer_pingable/ Do some people know more about that case? -- kind regards Marco Send unsolicited bulk mail to 1768504259muell(a)stinkedores.dorfdsl.de

5 8

New c-nsp, j-nsp, a-nsp, etc mailing lists
by Drew Weaver 20 Jan '26

20 Jan '26

I was a big fan of the *-nsp(a)puck.nether.net<mailto:*-nsp@puck.nether.net> mailing lists that now seem to be completely gone without any indication of whether or when they might return. I've been considering just setting up new ones. Please email me off-list if you think this might be useful. Thanks, -Drew

15 25