Autonomous system detail  ·  GB flag GB

AS2856

Announced

Operated by British Telecommunications PLC, GB flag GB.

Summary

// analyst note
A 2856 IP is typically a UK BT consumer/business broadband subscriber; BT's international transit sits under AS5400.
// security note
UK residential/business eyeball + backbone.
IPv4 prefixes
537
~18.5M addresses
IPv6 prefixes
7
announced
Peer networks
149
1 up · 26 down
IANA block
2830-2879
Assigned by RIPE NCC
[ 01 ] — Context

About this ASN.

Updated  ·  Confidence: High  ·  4 sources  ·  How this page is checked

AS2856 is the UK regional autonomous system of British Telecommunications PLC, the incumbent UK operator, registered under RIPE since December 1993. The RIPE record labels it the "BTnet UK Regional network," and it is a mixed eyeball-and-backbone ASN: a large UK residential and business access network combined with national backbone capacity, classified in PeeringDB as an NSP. Community route-intelligence tools rank it among the top networks by estimated eyeballs (roughly #37 globally and #1 in the UK) and around #36 by originated IPv4 space; it announces a few hundred IPv4 prefixes (about 13.7–13.8 million addresses) but a strikingly small IPv6 set (single digits), reflecting limited IPv6 origination on this particular ASN. Its route hygiene is clean — in the observed view every originated prefix was RPKI-valid with no invalids. BT's international transit and global carrier role sit on a separate ASN, AS5400 (British Telecommunications International), which is also an upstream feeding the UK regional network; the group additionally includes AS8968 (BT Italia), and the AS-BTGB set ties the family together. Traffic on AS2856 is predominantly inbound at a few Tbps. For triage, a 2856 address is typically a UK BT consumer or business broadband subscriber, with the usual residential dynamic-IP caveat.

Operator
British Telecommunications PLC (RIPE org ORG-BPIS1-RIPE) [Confirmed] — RIPE RDAP/WHOIS
Country / RIR
UK, RIPE [Confirmed] — RIPE RDAP
Allocated
1993-12-22 [Confirmed] — RIPE RDAP / DNSlytics
Org status
active; part of BT Group plc — bt.com

Security/abuse context

UK residential/business eyeball + backbone. Residential dynamic-IP reassignment caveat. RPKI all valid (~333 valid / 0 invalid observed). No carrier-specific abuse listing of note as of 2026-06-04 — bgp.he.net

Network & routing

Our research recorded 483 IPv4 prefixes; RouteViews currently observes 537.
Network type
mixed — large UK ISP-eyeball (BTnet) + national backbone (PeeringDB NSP) [Confirmed] — PeeringDB + RIPE aut-num
Size
~324–483 IPv4 prefixes originated (~13.7–13.8M addrs), ~3–7 IPv6 (very small IPv6); community ranks ~#37 eyeballs globally / ~#1 UK / ~#36 originated IPv4 — RIPEstat (483 v4 / 7 v6, 2026-05-21), bgp.he.net / bgp.tools
Routing/peering
~184–252 peers; ~2 upstreams incl. sibling AS5400 (BT International); traffic 1–5 Tbps, mostly inbound — RIPE import policy, peeringdb.com
Notable usage
BTnet UK regional access + national backbone — bt.net
Related ASNs
AS5400 (British Telecommunications International — international/transit ASN), AS8968 (BT Italia); as-set AS-BTGB
Analyst note
A 2856 IP is typically a UK BT consumer/business broadband subscriber; BT's international transit sits under AS5400.
[ 02 ] — Announced prefixes

What this network routes.

544 prefixes total · as observed by RouteViews at 2026-09-20 · one collector view, not a global census
// IPv4 prefixes537
  1. 86.128.0.0/10/10
  2. 81.128.0.0/11/11
  3. 86.128.0.0/11/11
  4. 109.144.0.0/12/12
  5. 217.32.0.0/12/12
  6. 81.128.0.0/12/12
  7. 86.128.0.0/12/12
  8. 31.48.0.0/13/13
  9. 95.144.0.0/13/13
  10. 147.148.0.0/14/14
  11. 194.72.0.0/14/14
  12. 213.120.0.0/14/14
  13. 31.100.0.0/14/14
  14. 31.112.0.0/14/14
  15. 31.116.0.0/14/14
  16. 109.180.0.0/15/15
  17. 31.106.0.0/15/15
  18. 31.122.0.0/15/15
  19. 31.126.0.0/15/15
  20. 31.90.0.0/15/15
  21. 31.92.0.0/15/15
  22. 46.68.0.0/15/15
  23. 5.80.0.0/15/15
  24. 109.249.0.0/16/16
  25. 132.146.0.0/16/16
  26. 147.152.0.0/16/16
  27. 149.254.0.0/16/16
  28. 165.120.0.0/16/16
  29. 193.113.0.0/16/16
  30. 195.171.0.0/16/16
  31. 195.99.0.0/16/16
  32. 212.140.0.0/16/16
  33. 213.1.0.0/16/16
  34. 31.104.0.0/16/16
  35. 31.116.0.0/16/16
  36. 31.117.0.0/16/16
  37. 31.118.0.0/16/16
  38. 31.119.0.0/16/16
  39. 31.120.0.0/16/16
  40. 31.121.0.0/16/16
  41. 31.124.0.0/16/16
  42. 31.94.0.0/16/16
  43. 31.96.0.0/16/16
  44. 5.81.0.0/16/16
  45. 51.14.0.0/16/16
  46. 62.172.0.0/16/16
  47. 62.239.0.0/16/16
  48. 62.6.0.0/16/16
  49. 62.7.0.0/16/16
  50. 91.111.0.0/16/16
  51. 144.87.128.0/17/17
  52. 213.205.192.0/18/18
  53. 9.232.192.0/18/18
  54. 9.237.128.0/18/18
  55. 159.180.96.0/19/19
  56. 193.38.192.0/19/19
  57. 194.102.0.0/19/19
  58. 195.218.32.0/19/19
  59. 212.82.0.0/19/19
  60. 84.23.0.0/19/19
  61. 9.151.0.0/19/19
  62. 9.237.192.0/19/19
  63. 9.237.96.0/19/19
  64. 144.87.0.0/20/20
  65. 144.87.16.0/20/20
  66. 193.35.128.0/20/20
  67. 193.37.160.0/20/20
  68. 213.205.208.0/20/20
  69. 217.15.64.0/20/20
  70. 51.230.0.0/20/20
  71. 51.230.112.0/20/20
  72. 51.230.16.0/20/20
  73. 51.230.32.0/20/20
  74. 51.230.48.0/20/20
  75. 51.230.64.0/20/20
  76. 51.230.80.0/20/20
  77. 51.230.96.0/20/20
  78. 85.88.224.0/20/20
  79. 9.151.208.0/20/20
  80. 9.233.48.0/20/20
  81. 144.87.24.0/21/21
  82. 161.104.0.0/21/21
  83. 178.78.112.0/21/21
  84. 178.78.120.0/21/21
  85. 188.172.160.0/21/21
  86. 188.172.168.0/21/21
  87. 194.169.32.0/21/21
  88. 5.35.192.0/21/21
  89. 82.108.32.0/21/21
  90. 83.245.16.0/21/21
  91. 87.237.16.0/21/21
  92. 9.151.248.0/21/21
  93. 94.72.248.0/21/21
  94. 144.87.24.0/22/22
  95. 144.87.28.0/22/22
  96. 145.79.172.0/22/22
  97. 147.189.68.0/22/22
  98. 147.189.76.0/22/22
  99. 147.78.68.0/22/22
  100. 15.145.20.0/22/22
  101. 151.240.180.0/22/22
  102. 151.240.184.0/22/22
  103. 151.240.188.0/22/22
  104. 151.240.192.0/22/22
  105. 151.240.196.0/22/22
  106. 151.240.200.0/22/22
  107. 151.241.180.0/22/22
  108. 151.241.184.0/22/22
  109. 151.241.188.0/22/22
  110. 151.241.192.0/22/22
  111. 151.241.196.0/22/22
  112. 151.241.200.0/22/22
  113. 151.241.52.0/22/22
  114. 151.241.56.0/22/22
  115. 151.241.60.0/22/22
  116. 151.244.204.0/22/22
  117. 151.244.208.0/22/22
  118. 151.244.80.0/22/22
  119. 151.245.204.0/22/22
  120. 151.245.208.0/22/22
  121. 151.245.80.0/22/22
  122. 164.38.120.0/22/22
  123. 164.38.16.0/22/22
  124. 164.38.184.0/22/22
  125. 167.148.60.0/22/22
  126. 178.78.108.0/22/22
  127. 178.92.112.0/22/22
  128. 178.92.180.0/22/22
  129. 178.93.104.0/22/22
  130. 178.94.244.0/22/22
  131. 178.95.60.0/22/22
  132. 185.68.200.0/22/22
  133. 185.90.32.0/22/22
  134. 193.187.140.0/22/22
  135. 193.35.220.0/22/22
  136. 193.36.80.0/22/22
  137. 193.38.192.0/22/22
  138. 194.32.20.0/22/22
  139. 212.134.124.0/22/22
  140. 212.134.164.0/22/22
  141. 212.134.208.0/22/22
  142. 212.134.224.0/22/22
  143. 212.212.16.0/22/22
  144. 213.249.188.0/22/22
  145. 217.217.36.0/22/22
  146. 217.217.56.0/22/22
  147. 217.217.60.0/22/22
  148. 37.143.0.0/22/22
  149. 37.97.112.0/22/22
  150. 46.248.120.0/22/22
  151. 46.248.96.0/22/22
  152. 51.146.128.0/22/22
  153. 51.146.136.0/22/22
  154. 51.146.252.0/22/22
  155. 51.146.44.0/22/22
  156. 51.194.100.0/22/22
  157. 64.205.136.0/22/22
  158. 64.205.144.0/22/22
  159. 72.9.180.0/22/22
  160. 78.105.136.0/22/22
  161. 81.161.52.0/22/22
  162. 82.108.116.0/22/22
  163. 82.108.140.0/22/22
  164. 82.108.4.0/22/22
  165. 82.108.44.0/22/22
  166. 82.108.52.0/22/22
  167. 82.108.68.0/22/22
  168. 82.108.92.0/22/22
  169. 82.38.56.0/22/22
  170. 82.41.112.0/22/22
  171. 83.245.24.0/22/22
  172. 85.204.160.0/22/22
  173. 94.232.100.0/22/22
  174. 142.205.162.0/23/23
  175. 144.177.74.0/23/23
  176. 148.253.220.0/23/23
  177. 152.114.220.0/23/23
  178. 152.114.222.0/23/23
  179. 157.236.254.0/23/23
  180. 159.253.66.0/23/23
  181. 178.212.56.0/23/23
  182. 178.78.106.0/23/23
  183. 185.177.64.0/23/23
  184. 192.177.94.0/23/23
  185. 193.35.158.0/23/23
  186. 193.35.160.0/23/23
  187. 193.36.78.0/23/23
  188. 193.38.192.0/23/23
  189. 193.38.194.0/23/23
  190. 194.189.186.0/23/23
  191. 205.239.40.0/23/23
  192. 209.101.8.0/23/23
  193. 213.169.196.0/23/23
  194. 213.169.202.0/23/23
  195. 213.190.16.0/23/23
  196. 213.190.18.0/23/23
  197. 217.31.10.0/23/23
  198. 23.230.82.0/23/23
  199. 31.130.240.0/23/23
  200. 45.149.168.0/23/23
  201. 45.149.170.0/23/23
  202. 46.248.102.0/23/23
  203. 46.248.104.0/23/23
  204. 50.118.154.0/23/23
  205. 51.194.36.0/23/23
  206. 62.192.124.0/23/23
  207. 79.139.52.0/23/23
  208. 79.139.54.0/23/23
  209. 82.108.102.0/23/23
  210. 82.108.152.0/23/23
  211. 82.108.88.0/23/23
  212. 82.136.54.0/23/23
  213. 85.189.132.0/23/23
  214. 85.189.154.0/23/23
  215. 85.189.164.0/23/23
  216. 85.189.174.0/23/23
  217. 85.189.190.0/23/23
  218. 85.189.72.0/23/23
  219. 85.189.74.0/23/23
  220. 85.189.76.0/23/23
  221. 85.189.78.0/23/23
  222. 85.88.240.0/23/23
  223. 87.86.24.0/23/23
  224. 89.145.172.0/23/23
  225. 89.39.172.0/23/23
  226. 91.236.216.0/23/23
  227. 94.26.64.0/23/23
  228. 109.205.158.0/24/24
  229. 132.153.244.0/24/24
  230. 132.153.245.0/24/24
  231. 132.153.246.0/24/24
  232. 132.153.247.0/24/24
  233. 132.153.248.0/24/24
  234. 132.153.249.0/24/24
  235. 132.153.250.0/24/24
  236. 132.153.251.0/24/24
  237. 132.153.252.0/24/24
  238. 132.153.253.0/24/24
  239. 132.153.254.0/24/24
  240. 132.153.3.0/24/24
  241. 132.244.79.0/24/24
  242. 138.108.94.0/24/24
  243. 143.223.132.0/24/24
  244. 147.90.115.0/24/24
  245. 147.90.127.0/24/24
  246. 147.90.32.0/24/24
  247. 147.90.36.0/24/24
  248. 147.90.55.0/24/24
  249. 148.252.3.0/24/24
  250. 148.252.7.0/24/24
  251. 149.117.130.0/24/24
  252. 149.254.1.0/24/24
  253. 151.242.24.0/24/24
  254. 151.242.42.0/24/24
  255. 151.243.254.0/24/24
  256. 151.246.145.0/24/24
  257. 151.246.239.0/24/24
  258. 151.247.220.0/24/24
  259. 151.247.231.0/24/24
  260. 151.247.245.0/24/24
  261. 152.114.196.0/24/24
  262. 156.146.3.0/24/24
  263. 157.236.254.0/24/24
  264. 157.236.255.0/24/24
  265. 159.197.13.0/24/24
  266. 159.197.44.0/24/24
  267. 159.197.45.0/24/24
  268. 163.5.115.0/24/24
  269. 163.5.122.0/24/24
  270. 163.5.208.0/24/24
  271. 163.5.217.0/24/24
  272. 163.5.222.0/24/24
  273. 163.5.249.0/24/24
  274. 163.5.37.0/24/24
  275. 163.5.67.0/24/24
  276. 163.5.98.0/24/24
  277. 164.134.1.0/24/24
  278. 164.134.134.0/24/24
  279. 164.134.135.0/24/24
  280. 164.134.136.0/24/24
  281. 164.134.137.0/24/24
  282. 164.134.138.0/24/24
  283. 164.38.12.0/24/24
  284. 164.38.134.0/24/24
  285. 164.38.148.0/24/24
  286. 164.38.149.0/24/24
  287. 164.38.156.0/24/24
  288. 164.38.196.0/24/24
  289. 164.38.197.0/24/24
  290. 164.38.2.0/24/24
  291. 164.38.31.0/24/24
  292. 164.38.32.0/24/24
  293. 164.38.33.0/24/24
  294. 164.38.34.0/24/24
  295. 166.88.17.0/24/24
  296. 166.88.18.0/24/24
  297. 166.88.200.0/24/24
  298. 166.88.32.0/24/24
  299. 185.128.205.0/24/24
  300. 185.149.6.0/24/24
  301. 185.230.13.0/24/24
  302. 185.230.15.0/24/24
  303. 185.58.165.0/24/24
  304. 188.220.122.0/24/24
  305. 188.220.151.0/24/24
  306. 188.220.157.0/24/24
  307. 188.220.167.0/24/24
  308. 188.220.194.0/24/24
  309. 188.220.212.0/24/24
  310. 188.220.229.0/24/24
  311. 188.221.168.0/24/24
  312. 188.221.177.0/24/24
  313. 188.221.184.0/24/24
  314. 188.221.188.0/24/24
  315. 188.221.210.0/24/24
  316. 192.12.73.0/24/24
  317. 192.152.14.0/24/24
  318. 192.53.46.0/24/24
  319. 192.65.219.0/24/24
  320. 192.65.221.0/24/24
  321. 192.65.222.0/24/24
  322. 192.65.223.0/24/24
  323. 192.65.224.0/24/24
  324. 192.65.225.0/24/24
  325. 192.65.226.0/24/24
  326. 192.65.227.0/24/24
  327. 192.65.228.0/24/24
  328. 192.8.112.0/24/24
  329. 192.8.149.0/24/24
  330. 193.111.18.0/24/24
  331. 193.111.19.0/24/24
  332. 193.138.107.0/24/24
  333. 193.195.138.0/24/24
  334. 193.23.32.0/24/24
  335. 193.32.46.0/24/24
  336. 193.32.48.0/24/24
  337. 193.33.199.0/24/24
  338. 193.35.197.0/24/24
  339. 193.36.240.0/24/24
  340. 193.36.243.0/24/24
  341. 193.36.253.0/24/24
  342. 193.36.80.0/24/24
  343. 193.37.142.0/24/24
  344. 193.39.141.0/24/24
  345. 193.84.142.0/24/24
  346. 193.9.26.0/24/24
  347. 194.101.69.0/24/24
  348. 194.132.24.0/24/24
  349. 194.132.25.0/24/24
  350. 194.155.58.0/24/24
  351. 194.189.44.0/24/24
  352. 194.227.120.0/24/24
  353. 194.227.72.0/24/24
  354. 194.227.73.0/24/24
  355. 194.246.78.0/24/24
  356. 194.32.207.0/24/24
  357. 194.32.29.0/24/24
  358. 194.32.31.0/24/24
  359. 194.35.183.0/24/24
  360. 194.36.135.0/24/24
  361. 194.36.68.0/24/24
  362. 194.59.188.0/24/24
  363. 194.60.136.0/24/24
  364. 194.60.137.0/24/24
  365. 194.60.138.0/24/24
  366. 194.60.139.0/24/24
  367. 195.104.240.0/24/24
  368. 195.130.11.0/24/24
  369. 195.130.12.0/24/24
  370. 195.130.13.0/24/24
  371. 195.130.14.0/24/24
  372. 195.130.15.0/24/24
  373. 195.130.3.0/24/24
  374. 195.130.6.0/24/24
  375. 195.182.62.0/24/24
  376. 195.35.123.0/24/24
  377. 195.36.106.0/24/24
  378. 195.88.20.0/24/24
  379. 198.178.235.0/24/24
  380. 198.232.43.0/24/24
  381. 205.239.42.0/24/24
  382. 207.180.43.0/24/24
  383. 212.134.46.0/24/24
  384. 212.134.52.0/24/24
  385. 212.134.54.0/24/24
  386. 212.148.1.0/24/24
  387. 213.209.146.0/24/24
  388. 213.209.149.0/24/24
  389. 213.209.150.0/24/24
  390. 216.120.189.0/24/24
  391. 216.165.88.0/24/24
  392. 217.31.9.0/24/24
  393. 23.230.242.0/24/24
  394. 23.230.252.0/24/24
  395. 23.26.108.0/24/24
  396. 23.26.117.0/24/24
  397. 23.26.131.0/24/24
  398. 23.26.192.0/24/24
  399. 23.26.70.0/24/24
  400. 23.27.102.0/24/24
  401. 23.27.103.0/24/24
  402. 23.27.104.0/24/24
  403. 23.27.105.0/24/24
  404. 23.27.106.0/24/24
  405. 23.27.107.0/24/24
  406. 23.27.108.0/24/24
  407. 23.27.32.0/24/24
  408. 23.27.33.0/24/24
  409. 23.27.34.0/24/24
  410. 23.27.35.0/24/24
  411. 23.27.36.0/24/24
  412. 23.27.37.0/24/24
  413. 23.27.38.0/24/24
  414. 23.27.39.0/24/24
  415. 23.27.40.0/24/24
  416. 37.230.61.0/24/24
  417. 37.44.229.0/24/24
  418. 37.44.230.0/24/24
  419. 37.44.231.0/24/24
  420. 40.27.28.0/24/24
  421. 40.27.72.0/24/24
  422. 45.149.7.0/24/24
  423. 45.39.116.0/24/24
  424. 45.39.188.0/24/24
  425. 46.68.66.0/24/24
  426. 5.181.136.0/24/24
  427. 50.117.51.0/24/24
  428. 50.117.7.0/24/24
  429. 51.146.235.0/24/24
  430. 51.149.18.0/24/24
  431. 51.149.19.0/24/24
  432. 51.230.255.0/24/24
  433. 51.241.201.0/24/24
  434. 51.241.3.0/24/24
  435. 51.64.32.0/24/24
  436. 51.64.34.0/24/24
  437. 51.64.35.0/24/24
  438. 62.244.11.0/24/24
  439. 62.244.12.0/24/24
  440. 62.244.29.0/24/24
  441. 62.244.36.0/24/24
  442. 62.244.37.0/24/24
  443. 62.244.41.0/24/24
  444. 62.244.43.0/24/24
  445. 62.244.45.0/24/24
  446. 62.244.56.0/24/24
  447. 77.90.135.0/24/24
  448. 77.90.138.0/24/24
  449. 77.90.145.0/24/24
  450. 77.90.151.0/24/24
  451. 77.90.153.0/24/24
  452. 77.90.164.0/24/24
  453. 77.90.184.0/24/24
  454. 77.94.224.0/24/24
  455. 78.105.151.0/24/24
  456. 78.105.175.0/24/24
  457. 78.105.179.0/24/24
  458. 78.105.188.0/24/24
  459. 78.105.191.0/24/24
  460. 78.105.194.0/24/24
  461. 78.105.198.0/24/24
  462. 78.105.200.0/24/24
  463. 78.105.202.0/24/24
  464. 78.105.97.0/24/24
  465. 79.132.64.0/24/24
  466. 79.132.65.0/24/24
  467. 80.81.58.0/24/24
  468. 82.140.134.0/24/24
  469. 82.140.138.0/24/24
  470. 82.140.143.0/24/24
  471. 82.140.170.0/24/24
  472. 82.153.179.0/24/24
  473. 82.153.181.0/24/24
  474. 82.153.190.0/24/24
  475. 82.153.238.0/24/24
  476. 82.153.33.0/24/24
  477. 82.153.85.0/24/24
  478. 82.153.88.0/24/24
  479. 82.38.9.0/24/24
  480. 82.39.173.0/24/24
  481. 83.223.153.0/24/24
  482. 83.223.154.0/24/24
  483. 84.46.177.0/24/24
  484. 84.46.181.0/24/24
  485. 84.46.183.0/24/24
  486. 84.46.188.0/24/24
  487. 84.46.190.0/24/24
  488. 84.46.191.0/24/24
  489. 84.46.194.0/24/24
  490. 84.55.17.0/24/24
  491. 84.55.22.0/24/24
  492. 85.189.153.0/24/24
  493. 85.189.156.0/24/24
  494. 85.189.159.0/24/24
  495. 85.189.160.0/24/24
  496. 85.189.162.0/24/24
  497. 85.189.167.0/24/24
  498. 85.189.178.0/24/24
  499. 85.189.181.0/24/24
  500. 85.189.183.0/24/24
  501. 85.189.189.0/24/24
  502. 85.235.123.0/24/24
  503. 86.110.57.0/24/24
  504. 86.38.118.0/24/24
  505. 86.38.123.0/24/24
  506. 86.38.148.0/24/24
  507. 86.38.193.0/24/24
  508. 86.38.233.0/24/24
  509. 86.38.244.0/24/24
  510. 86.38.56.0/24/24
  511. 86.38.63.0/24/24
  512. 86.38.65.0/24/24
  513. 86.38.67.0/24/24
  514. 86.38.68.0/24/24
  515. 86.38.86.0/24/24
  516. 86.38.93.0/24/24
  517. 86.54.81.0/24/24
  518. 87.232.114.0/24/24
  519. 87.76.183.0/24/24
  520. 89.117.183.0/24/24
  521. 89.117.198.0/24/24
  522. 89.117.203.0/24/24
  523. 89.117.235.0/24/24
  524. 91.102.189.0/24/24
  525. 91.102.190.0/24/24
  526. 91.102.191.0/24/24
  527. 91.142.128.0/24/24
  528. 91.227.78.0/24/24
  529. 91.230.16.0/24/24
  530. 91.230.40.0/24/24
  531. 91.90.125.0/24/24
  532. 91.90.127.0/24/24
  533. 94.125.16.0/24/24
  534. 94.125.17.0/24/24
  535. 94.125.18.0/24/24
  536. 94.125.19.0/24/24
  537. 95.173.59.0/24/24
// IPv6 prefixes7
  1. 2a00:2380::/25/25
  2. 2a01:4c8::/29/29
  3. 2a02:ee80:4176::/47/47
  4. 2001:4878:c259::/48/48
  5. 2a01:4c8:f400::/48/48
  6. 2a01:4c8:f401::/48/48
  7. 2a03:1e82:90ff::/48/48
[ 03 ] — Notable peers & upstreams

Who it talks to.

149 observed neighbours
// Notable connections32 of 149 observed

Neighbours observed by RouteViews at 2026-09-20, lowest ASN first. Relationships are inferences from the CAIDA AS Relationships Dataset, 2026-08-01, and establish no commercial arrangement; a dash means the inference did not resolve.

ASNOperatorRole
AS5400 — upstream
AS2134 — downstream
AS2535 — downstream
AS3303 — peer
AS3573 — —
AS3738 — downstream
AS5091 — downstream
AS6461 — peer
AS6871 — downstream
AS7358 — downstream
AS8336 — downstream
AS8435 — downstream
AS8698 — downstream
AS9002 — peer
AS9011 — downstream
AS11031 — downstream
AS11528 — downstream
AS11939 — downstream
AS12440 — downstream
AS13205 — downstream
AS13447 — —
AS14630 — downstream
AS14766 — downstream
AS14931 — downstream
AS15141 — downstream
AS15248 — downstream
AS15499 — downstream
AS15865 — downstream
AS16477 — downstream
AS16525 — downstream
AS17274 — downstream
AS17903 — downstream
Neighbours observed via public BGP collectors; not a complete peering list.