March 2026 - NANOG - lists.nanog.org

is it just me or...
by Michael Thomas 14 Apr '26

14 Apr '26

I'm using Thunderbird to read mail and lately the only thing I've seen in the mail.from address is |North American Network Operators Group | and not the author's address which makes it really hard to tell who is talking to whom. I is just me, or has there been a list config change that is causing this? Mike

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Fwd: CHI-NOG-13 - Call for Presentations - May 28th, 2026
by Tom Kacprzynski 03 Apr '26

03 Apr '26

CHI-NOG 13 – Chicago Network Operators Group May 28, 2026 | Chicago, IL The Chicago Network Operators Group (CHI-NOG) is a vendor-neutral organization dedicated to fostering a regional community of network professionals. Our mission is to share insights into the latest technology trends, encourage collaboration, and provide valuable networking opportunities. We are excited to announce that CHI-NOG will host its thirteenth annual conference on May 28, 2026, in downtown Chicago. For detailed information, visit the event page: https://chinog.org/chi-nog-13/ ------------------------------ *CALL FOR PRESENTATIONS* The CHI-NOG Program Committee invites proposals for presentations on cutting-edge networking technologies, including (but not limited to) the following topics. *Abstract Submission Deadline: April 6, 2026* Service Provider Networks - Internet Backbone Operations - Broadband and Transport Technologies - Optical Networking - Mobile Networks - Midwest / Chicago Infrastructure Development - Network Traffic Engineering and Network Planning - Advanced BGP/MPLS Technologies - SRv6 and MPLS Segment Routing - Research on Internet Operations and Deployment Enterprise Networking - Enterprise architecture - SD-WAN - OT Networking - Corporate network operations - Low-latency / Financial Networks Datacenter Infrastructure - Datacenter Infrastructure - Datacenter Network Fabrics - High-performance computing networks - AI cluster networking Peering & Interconnection - Interconnection and Peering - Internet Exchange Points (IXPs) - Content Delivery Networks (CDNs) AI Networking - AI Network Infrastructure - AI Ops - Introduction to AI Technologies - Networking for AI workloads Security - Network Security - Zero Trust Networking - Internet Routing Security (RPKI) - DNSSEC Automation - Network Automation and Programmability - Infrastructure as Code - Automation frameworks and tooling Observability - Network Monitoring - Network Observability - Telemetry and analytics - Troubleshooting large-scale networks Career - Career advancement in networking - Leadership and professional development Other - Topics that do not fit into the categories above ------------------------------ PRESENTATION GUIDELINES Session Duration Standard presentations are 30 minutes, including Q&A. Extended sessions (up to 60 minutes) may be considered upon request. Content Focus Presentations should emphasize original technical insights and real-world operational experience. Marketing or commercial product promotion is discouraged. *KEY DATES* Call for Presentations: March 9, 2026 Abstract Submission Deadline: April 6, 2026 Selection Notification: April 15, 2026 Full Presentation Submission: May 15, 2026 Conference Date: May 28, 2026 ------------------------------ *HOW TO SUBMIT* Submit your abstract proposal using the submission form: https://chinog.org/chi-nog-13/abstract-submission/ All accepted speakers will receive complimentary tickets to the conference and an exclusive hoodie. For examples of past presentations, visit: https://www.youtube.com/user/chicagonog/videos The CHI-NOG Program Committee looks forward to receiving your submissions and seeing you at the event. Tom Kacprzynski CHI-NOG Program Committee Chair

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Interview Invitation for Educational Research
by Muhammad Hassan Tanveer 31 Mar '26

31 Mar '26

Hello Everyone! We are conducting a research study on how organizations handle the aftermath of cybersecurity incidents and we would greatly value your perspective. Our focus is on what happens after a security incident is resolved. How do teams reflect on these events? How do organizations learn from incidents? Are you a cybersecurity practitioner? We would love to hear from you! We invite you to participate in a ~45-minute online interview to share your insights and experiences. Your insights will help us better understand what post-incident practices actually look like. Please be assured your responses will be kept completely anonymous, and no confidential information will be asked. If you are interested in participating, you can reach out to us via email or by filling out this form: https://nextcloud.mpi-inf.mpg.de/index.php/apps/forms/s/zTpeiNiaY9NWAPL7Bb9… Thank you!

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Adhesive Rack Unit Indicators?
by Dan Mahoney 28 Mar '26

28 Mar '26

Hey there folks, In the past, I've seen rack posts come with their rack positions labeled, from the factory, 0-40 or whatever, for recording what "U" a piece of equipment is on, starting with 1 at the bottom and numbering every 1.75 inches as you rise (i.e. every 3 holes). I've also seen the low-tech version of this (aka "A Sharpie") used extensively. But I could *swear* I saw some company that just made an adhesive strip that you could put into your cabinet that made this simpler, and perma-labeled your rack, but either I'm hallucinating, it's no longer made, or I've gotten worse with google (or the AI summary and reduced results are failing me). Does anyone have recollection of such a beast? -Dan

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Google Bot Detection Whitelisting
by Richard Laager 28 Mar '26

28 Mar '26

Is there a way to get Google to whitelist an IP (in this case for a school) that is getting blocked via bot detection? -- Richard Laager IT Manager Wikstrom Telephone Company

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Weekly Global IPv4 Routing Table Report
by Routing Table Analysis Role Account 27 Mar '26

27 Mar '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 28 Mar, 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: 1042315 Prefixes after maximum aggregation (per Origin AS): 398790 Deaggregation factor: 2.61 Unique aggregates announced (without unneeded subnets): 511501 Number of IPv4 prefixes with a valid ROA: 624960 Number of IPv4 prefixes with an invalid ROA: 1477 Number of IPv4 prefixes with no ROA: 415878 Total ASes present in the Internet Routing Table: 78212 Prefixes per ASN: 13.33 Origin-only ASes present in the Internet Routing Table: 67192 Origin ASes announcing only one prefix: 27328 Transit ASes present in the Internet Routing Table: 11020 Transit-only ASes present in the Internet Routing Table: 563 Average AS path length visible in the Internet Routing Table: 4.7 Max AS path length visible: 69 Max AS path prepend of ASN (269326) 61 Prefixes from unregistered ASNs in the Routing Table: 1085 Number of instances of unregistered ASNs: 1127 Number of 32-bit ASNs allocated by the RIRs: 49156 Number of 32-bit ASNs visible in the Routing Table: 40225 Prefixes from 32-bit ASNs in the Routing Table: 226123 Number of bogon 32-bit ASNs visible in the Routing Table: 133 Special use prefixes present in the Routing Table: 1 Prefixes being announced from unallocated address space: 399 Number of addresses announced to Internet: 3107950208 Equivalent to 185 /8s, 63 /16s and 142 /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: 339196 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 286367 Total APNIC prefixes after maximum aggregation: 82782 APNIC Deaggregation factor: 3.46 Prefixes being announced from the APNIC address blocks: 273345 Unique aggregates announced from the APNIC address blocks: 107030 APNIC Region origin ASes present in the Internet Routing Table: 15165 APNIC Prefixes per ASN: 18.02 APNIC Region origin ASes announcing only one prefix: 4658 APNIC Region transit ASes present in the Internet Routing Table: 2003 Average APNIC Region AS path length visible: 4.7 Max APNIC Region AS path length visible: 32 Number of APNIC region 32-bit ASNs visible in the Routing Table: 10704 Number of APNIC addresses announced to Internet: 753941120 Equivalent to 44 /8s, 240 /16s and 58 /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: 303748 Total ARIN prefixes after maximum aggregation: 135968 ARIN Deaggregation factor: 2.23 Prefixes being announced from the ARIN address blocks: 303078 Unique aggregates announced from the ARIN address blocks: 146564 ARIN Region origin ASes present in the Internet Routing Table: 19411 ARIN Prefixes per ASN: 15.61 ARIN Region origin ASes announcing only one prefix: 7090 ARIN Region transit ASes present in the Internet Routing Table: 1933 Average ARIN Region AS path length visible: 4.3 Max ARIN Region AS path length visible: 29 Number of ARIN region 32-bit ASNs visible in the Routing Table: 5531 Number of ARIN addresses announced to Internet: 1348055040 Equivalent to 80 /8s, 89 /16s and 176 /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, 393216-404380 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: 286804 Total RIPE prefixes after maximum aggregation: 141614 RIPE Deaggregation factor: 2.03 Prefixes being announced from the RIPE address blocks: 289106 Unique aggregates announced from the RIPE address blocks: 187839 RIPE Region origin ASes present in the Internet Routing Table: 29347 RIPE Prefixes per ASN: 9.85 RIPE Region origin ASes announcing only one prefix: 12158 RIPE Region transit ASes present in the Internet Routing Table: 3970 Average RIPE Region AS path length visible: 4.8 Max RIPE Region AS path length visible: 29 Number of RIPE region 32-bit ASNs visible in the Routing Table: 13208 Number of RIPE addresses announced to Internet: 732537472 Equivalent to 43 /8s, 169 /16s and 162 /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: 127368 Total LACNIC prefixes after maximum aggregation: 30744 LACNIC Deaggregation factor: 4.14 Prefixes being announced from the LACNIC address blocks: 123001 Unique aggregates announced from the LACNIC address blocks: 50226 LACNIC Region origin ASes present in the Internet Routing Table: 11378 LACNIC Prefixes per ASN: 10.81 LACNIC Region origin ASes announcing only one prefix: 2695 LACNIC Region transit ASes present in the Internet Routing Table: 2562 Average LACNIC Region AS path length visible: 5.4 Max LACNIC Region AS path length visible: 69 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 9402 Number of LACNIC addresses announced to Internet: 169853312 Equivalent to 10 /8s, 31 /16s and 193 /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: 36943 Total AfriNIC prefixes after maximum aggregation: 6979 AfriNIC Deaggregation factor: 5.29 Prefixes being announced from the AfriNIC address blocks: 53386 Unique aggregates announced from the AfriNIC address blocks: 19493 AfriNIC Region origin ASes present in the Internet Routing Table: 2014 AfriNIC Prefixes per ASN: 26.51 AfriNIC Region origin ASes announcing only one prefix: 727 AfriNIC Region transit ASes present in the Internet Routing Table: 383 Average AfriNIC Region AS path length visible: 5.3 Max AfriNIC Region AS path length visible: 53 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1380 Number of AfriNIC addresses announced to Internet: 103305216 Equivalent to 6 /8s, 40 /16s and 80 /24s AfriNIC AS Blocks 36864-37887, 327680-330751 & 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 13865 8945 105 CHINAMOBILE-CN China Mobile Communication 7545 5938 829 508 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 5032 4193 77 ERX-CERNET-BKB China Education and Resear 9498 4878 548 318 BBIL-AP BHARTI Airtel Ltd., IN 18403 4539 347 25 FPT-AS-AP FPT Telecom Company, VN 7552 4053 1332 29 VIETEL-AS-AP Viettel Group, VN 7713 3678 1044 65 TELKOMNET-AS-AP PT Telekomunikasi Indones 56046 3477 887 178 CMNET-JIANGSU-AP China Mobile communicati 45899 3355 1868 99 VNPT-AS-VN VNPT Corp, VN 24560 3011 862 516 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 14572 41225 5605 AMAZON-02 - Amazon.com, Inc., US 22773 4782 3117 368 ASN-CXA-ALL-CCI-22773-RDC - Cox Communica 11492 4647 308 1023 CABLEONE - CABLE ONE, INC., US 7155 3861 286 85 VIASAT-SP-BACKBONE - ViaSat,Inc., US 6327 3721 1321 75 SHAW - Shaw Communications, CA 396982 3294 4856 487 GOOGLE-CLOUD-PLATFORM - Google LLC, US 174 3244 8763 826 COGENT-174 - Cogent Communications, LLC, 749 3141 54728 2392 DNIC-AS-00749 - United States Department 36352 2704 222 890 AS-COLOCROSSING - HostPapa, US 16625 2669 1167 2082 AKAMAI-AS - Akamai Technologies, Inc., 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 7187 1711 149 UNI2-AS, ES 39891 4972 306 72 ALJAWWALSTC-AS, SA 9009 3845 356 2249 M247, RO 20940 3824 3389 110 AKAMAI-ASN1, NL 12389 3198 2321 869 ROSTELECOM-AS PJSC Rostelecom. Technical 212238 2696 195 1979 CDNEXT, GB 34984 2455 365 570 TELLCOM-AS, TR 8452 1717 1852 17 TE-AS TE-AS, EG 203020 1637 248 807 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 12825 3294 606 UNINET, MX 10620 3453 458 1104 Telmex Colombia S.A., CO 13999 2460 506 344 Mega Cable, S.A. de C.V., MX 11830 1958 369 65 Instituto Costarricense de Electricidad y 11664 1452 278 33 Techtel LMDS Comunicaciones Interactivas 28573 1372 2430 272 Claro NXT Telecomunicacoes Ltda, BR 3816 1342 770 213 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC, 6147 1244 371 22 INTEGRATEL PERU S.A.A., PE 26615 1059 2393 96 TIM SA, BR 22884 1056 67 356 TOTAL PLAY TELECOMUNICACIONES SA DE CV, M 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 2045 648 34 RAYA-AS, EG 36992 1854 1531 336 ETISALAT-MISR, EG 24863 1288 389 16 LINKdotNET-AS, EG 36935 1247 524 47 Vodafone-, EG 36903 1232 555 98 MT-MPLS, MA 37069 1117 1100 11 MOBINIL, EG 29571 1072 78 20 ORANGE-COTE-IVOIRE, CI 20011 589 155 220 NTT-DATA-Inc, ZA 15399 557 58 61 WANANCHI-, KE 36914 556 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 14572 41225 5605 AMAZON-02 - Amazon.com, Inc., US 9808 13865 8945 105 CHINAMOBILE-CN China Mobile Communication 8151 12825 3294 606 UNINET, MX 12479 7187 1711 149 UNI2-AS, ES 7545 5938 829 508 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 5032 4193 77 ERX-CERNET-BKB China Education and Resear 39891 4972 306 72 ALJAWWALSTC-AS, SA 9498 4878 548 318 BBIL-AP BHARTI Airtel Ltd., IN 22773 4782 3117 368 ASN-CXA-ALL-CCI-22773-RDC - Cox Communica 11492 4647 308 1023 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 13865 13760 CHINAMOBILE-CN China Mobile Communications Grou 8151 12825 12219 UNINET, MX 12479 7187 7038 UNI2-AS, ES 7545 5938 5430 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 5032 4955 ERX-CERNET-BKB China Education and Research Net 39891 4972 4900 ALJAWWALSTC-AS, SA 9498 4878 4560 BBIL-AP BHARTI Airtel Ltd., IN 18403 4539 4514 FPT-AS-AP FPT Telecom Company, VN 22773 4782 4414 ASN-CXA-ALL-CCI-22773-RDC - Cox Communications 7552 4053 4024 VIETEL-AS-AP Viettel Group, VN 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 /11:95 /12:297 /13:583 /14:1191 /15:2095 /16:13629 /17:8376 /18:13382 /19:25674 /20:46928 /21:52858 /22:114232 /23:107839 /24:654376 /25:690 /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 7000 12825 UNINET, MX 12479 6129 7187 UNI2-AS, ES 39891 3656 4972 ALJAWWALSTC-AS, SA 11492 3507 4647 CABLEONE - CABLE ONE, INC., US 6327 3501 3721 SHAW - Shaw Communications, CA 22773 3051 4782 ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US 7155 2820 3861 VIASAT-SP-BACKBONE - ViaSat,Inc., US 16509 2614 14572 AMAZON-02 - Amazon.com, Inc., US 30036 2317 2666 MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US 10620 2233 3453 Telmex Colombia S.A., CO Complete listing at https://thyme.apnic.net/current/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2519 2:1691 3:1004 4:5 5:5120 6:196 7:6 8:1521 9:38 11:172 12:1189 13:680 14:2706 15:459 16:169 17:421 18:918 20:583 21:4 22:188 23:8214 24:2856 25:2 27:2738 28:2 29:19 31:3413 32:37 34:87 35:294 36:4646 37:4454 38:9989 39:1277 40:411 41:4550 42:2206 43:2986 44:447 45:19869 46:4893 47:411 48:100 49:2212 50:2035 51:618 52:1307 54:276 55:1114 56:11 57:321 58:2407 59:1440 60:1174 61:3133 62:3125 63:1754 64:6267 65:2132 66:6035 67:3252 68:1502 69:4219 70:1054 71:610 72:3155 74:3005 75:1489 76:591 77:2920 78:1939 79:1795 80:2352 81:2209 82:4025 83:1442 84:2098 85:3816 86:1095 87:2448 88:1354 89:4700 90:786 91:8421 92:2853 93:3018 94:4348 95:4661 96:1451 97:316 98:944 99:805 100:68 101:1364 102:4472 103:32393 104:5339 105:819 106:925 107:2848 108:1243 109:4220 110:2298 111:4174 112:3148 113:1981 114:2270 115:2236 116:2182 117:3480 118:2943 119:2119 120:2718 121:1593 122:2995 123:2257 124:1732 125:3018 126:125 128:1680 129:973 130:1609 131:2465 132:812 133:475 134:1661 135:606 136:1587 137:1413 138:3182 139:1626 140:1824 141:1699 142:2523 143:2106 144:1704 145:638 146:2204 147:2173 148:2716 149:3076 150:1349 151:2727 152:2315 153:988 154:9489 155:2315 156:4473 157:2275 158:1512 159:2816 160:3820 161:1950 162:4033 163:2449 164:2039 165:2631 166:1293 167:2258 168:4013 169:884 170:5560 171:1116 172:4540 173:3477 174:887 175:1359 176:3825 177:4839 178:4369 179:2299 180:3049 181:4473 182:3999 183:2826 184:2012 185:21806 186:5772 187:4971 188:4612 189:4562 190:9794 191:1576 192:11483 193:9596 194:7857 195:5814 196:3334 197:3255 198:6282 199:6096 200:8243 201:6413 202:10831 203:10513 204:4778 205:3767 206:4535 207:4023 208:4384 209:5495 210:4907 211:2780 212:5013 213:4118 214:1041 215:47 216:7285 217:3556 218:1753 219:590 220:2202 221:1308 222:1071 223:3418 End of report

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** Future Focus Areas of NANOG Conferences + More
by Nanog News 27 Mar '26

27 Mar '26

*** Future Focus Areas of NANOG Conferences* ------------------------------------------------------------ *Take a Look at the Key Topics Shaping our Next Conferences* Make your plans now, the future of NANOG is here. *REGISTER FOR N97 *(https://nanog.org/events/nanog-97/) *** NANOG Committee Spotlight: Workshop* ------------------------------------------------------------ *Learn More About our NANOG Workshop Committee* This Committee is responsible for determining Workshop topics, working closely with instructors to develop and deliver sessions, and guiding the creation of workshop content. *MORE INFO* ( https://storage.googleapis.com/site-media-prod/documents/workshop_committee… ) *** Reminder: Call for Content* ------------------------------------------------------------ *Transform Your Best Idea into a NANOG Talk* If you are interested in sharing your experiences, ideas, or the latest technologies with the greater NANOG community, submit a presentation proposal including draft slides no later than *Monday, April, 27.* *CALL FOR CONTENT *(https://nanog.org/program/call-content/) *** Video of the Week - Redefining Netflix BGP Architecture* ------------------------------------------------------------ *With Cisco's Fred Cuiller + Netflix's Elise Vennegues* *At 13K views and counting since NANOG 96, this Talk is worth the watch.* Scaling a global streaming platform like Netflix requires a robust, agile, and future-ready network infrastructure. In close collaboration, Netflix and Cisco embarked on a journey to evolve Netflix's BGP architecture, leveraging Cisco's advanced IOS XRv9000 UCS M7 appliance — a solution developed and refined to meet Netflix's unique requirements. *WATCH NOW* (https://www.youtube.com/watch? v=LOZDX7BlO74&list=PLO8DR5ZGla8i1P6NjMTMxvym0SWTtyn0G&index=42) *** 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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[Survey] When do you upgrade your network?
by Romain Jacob 27 Mar '26

27 Mar '26

Dear all, [My apologies if you receive multiple copies of this message] TL;DR I lead an academic research project to better understand the motives behind network hardware upgrades. If you are operating a network infrastructure and have 10 minutes to spare, we would greatly appreciate you filling out this short (anonymous) survey: https://tally.so/r/rjEkZR == Longer version == My name is Romain; I am a senior scientist at ETH Zürich, Switzerland, where I research the environmental impacts of Internet infrastructure and how we can steer networks to become more sustainable in the future. There is increasing evidence that a large part of the Internet's impact comes from the manufacturing, deployment, and recycling of hardware, suggesting that networks could substantially reduce their footprint by keeping network devices in operation for longer, despite possibly higher energy consumption in older hardware models. Some of my ongoing research aims to assess whether this hypothesis is correct; happy to tell you more about that if you are interested. Assuming it is indeed correct that network hardware should be kept in operation for longer, if we want to encourage this, we must understand why networks are being upgraded today. * What are the main motives behind network hardware upgrades nowadays? * What factors are preventing or discouraging longer hardware lifetime in networks? We prepared a short survey to help answer those questions. After some brief contextualization questions to clarify the network type and context, the core of the survey presents a list of possible motives for hardware upgrades and asks, for each, how important it typically is in your own network upgrades. The second half of the survey contains (optional) questions related to the current environmental sustainability practices in your organization. If you are operating a network or working for an organization that operates a public or private network infrastructure, we would greatly appreciate you filling out this short (anonymous) survey: https://tally.so/r/rjEkZR And, naturally, you are more than welcome to share this survey within your own network (of humans, I mean). Many thanks in advance! — Romain -- Romain JACOB Postdoctoral Researcher ETH Zurich Networked Systems Group (NSG) Lead: Prof. Laurent Vanbever www.romainjacob.net <https://www.romainjacob.net/> @RJacobPartner <https://twitter.com/RJacobPartner> @jacobr@discuss.systems <https://discuss.systems/@jacobr> Gloriastrasse 35, ETZ G84 8092 Zurich +41 7 68 16 88 22

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FCC issues new rules about foreign made routers
by Roy 27 Mar '26

27 Mar '26

FCC issues rules about sales of routers and such not made in the us https://www.marketscreener.com/news/us-regulator-bans-imports-of-new-foreig…

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Correctly dealing with bots and scrapers.
by Andrew Latham 25 Mar '26

25 Mar '26

I just had an issue with a web-server where I had to block a /18 of a large scraper. I have some topics I could use some input on. 1. What tools or setups have people found most successful for dealing with bots/scrapers that do not respect robots.txt for example? 2. What tools for response rate limiting deal with bots/scrapers that cycle over a large variety of IPs with the exact same user agent? 3. Has anyone written or found a tool to concentrate IP addresses into networks for IPTABLES or NFT? (60% of IPs for network X in list so add network X and remove individual IP entries.) -- - Andrew "lathama" Latham -

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