Autonomous system detail

AS1257

Announced

AS1257 announces 386 IPv4 and 38 IPv6 prefixes and peers with 203 other networks.

Summary

// analyst note
The supplied routing counts and AS_PATH neighbour sample are one combined observation from route-views2 and route-views6 at 2026-11-03T14:00:00.000Z; adjacencies do not establish commercial relationships.
IPv4 prefixes
386
~7.5M addresses
IPv6 prefixes
38
announced
Peer networks
203
0 up · 0 down
IANA block
1-1876
Assigned by ARIN
[ 01 ] — Context

About this ASN.

Updated  ·  Confidence: Low  ·  3 sources  ·  How this page is checked

AS1257’s operator and organizational identity are unknown from the supplied evidence; it announced 387 IPv4 prefixes and 38 IPv6 prefixes in the combined Route Views observation at 2026-11-03 14:00 UTC. That observation combines route-views2 and route-views6; the counts are not separate measurements for each collector. IANA lists the ASN in the block assigned by ARIN, which identifies the allocating RIR, not an individual assignment record or operator.

The snapshot estimates 6,460,928 IPv4 addresses across the observed prefixes and records 203 distinct AS_PATH neighbours. The supplied 32-AS sample includes AS174, AS1299, AS2914, AS3303, AS6453, and AS6939. These are observed path adjacencies; they do not establish verified peers, upstreams, customer relationships, or provider roles. The sample is not a complete neighbour list.

For identification, compare the ASN’s route origins and prefix set against an independently obtained, current routing view, and investigate registry records for the specific resources before attributing an organization or location. Check individual prefixes and origin authorization separately when assessing a routing anomaly. This snapshot alone cannot establish traffic prevalence, deployment, security, or legitimacy, and absence from this observation would not show that an ASN is inactive.

Identity
Operator and organization are Unknown in the supplied evidence.
Triage
Treat the 203 observed AS_PATH neighbours as routing adjacencies only; investigate specific prefixes and registry records before attributing an organization or relationship.
RIR
ARIN [Confirmed] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv
Operator
Unknown [Unknown] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv
AS name
Unknown [Unknown] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv
Country
Unknown [Unknown] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv
Website
Unknown [Unknown] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv

Network & routing

Network type
Unknown [Unknown] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
Observation scope
combined RouteViews snapshot at 2026-11-03T14:00:00.000Z; route-views2, route-views6 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
ASN
1257 [Confirmed] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv
IPv4 prefixes observed
387 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
IPv4 address estimate
6460928 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
IPv6 prefixes observed
38 [Confirmed] — https://archive.routeviews.org/route-views6/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
Observed AS_PATH neighbour count
203 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
Observed AS_PATH neighbour sample
AS174, AS1299, AS2497, AS2799, AS2914, AS3166, AS3249, AS3303, AS3306, AS3332, AS3491, AS5411, AS6453, AS6762, AS6830, AS6939, AS8240, AS8368, AS8674, AS9002, AS9201, AS12552, AS12597, AS12757, AS12935, AS15912, AS15991, AS16642, AS20861, AS20943, AS24819, AS25037
[Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
[ 02 ] — Announced prefixes

What this network routes.

424 prefixes total · as observed by RouteViews at 2026-11-06 · one collector view, not a global census
// IPv4 prefixes386
  1. 83.176.0.0/12/12
  2. 90.128.0.0/12/12
  3. 83.248.0.0/13/13
  4. 176.68.0.0/14/14
  5. 188.148.0.0/14/14
  6. 193.12.0.0/14/14
  7. 213.100.0.0/14/14
  8. 37.196.0.0/14/14
  9. 5.240.0.0/14/14
  10. 91.128.0.0/14/14
  11. 193.216.0.0/15/15
  12. 37.2.0.0/15/15
  13. 5.240.0.0/15/15
  14. 5.242.0.0/15/15
  15. 77.218.0.0/15/15
  16. 80.216.0.0/15/15
  17. 130.244.0.0/16/16
  18. 150.227.0.0/16/16
  19. 151.177.0.0/16/16
  20. 159.190.0.0/16/16
  21. 195.84.0.0/16/16
  22. 212.151.0.0/16/16
  23. 212.214.0.0/16/16
  24. 212.247.0.0/16/16
  25. 213.50.0.0/16/16
  26. 213.89.0.0/16/16
  27. 80.170.0.0/16/16
  28. 81.216.0.0/16/16
  29. 88.131.0.0/16/16
  30. 90.135.0.0/16/16
  31. 90.138.0.0/16/16
  32. 90.140.0.0/16/16
  33. 90.144.0.0/16/16
  34. 91.95.0.0/16/16
  35. 213.103.0.0/17/17
  36. 213.88.128.0/17/17
  37. 37.0.128.0/17/17
  38. 62.95.0.0/17/17
  39. 83.179.0.0/17/17
  40. 87.227.0.0/17/17
  41. 90.133.0.0/17/17
  42. 90.137.0.0/17/17
  43. 90.139.128.0/17/17
  44. 91.131.0.0/17/17
  45. 94.186.0.0/17/17
  46. 193.150.192.0/18/18
  47. 193.216.0.0/18/18
  48. 213.200.128.0/18/18
  49. 62.181.64.0/18/18
  50. 78.28.64.0/18/18
  51. 83.176.192.0/18/18
  52. 83.181.64.0/18/18
  53. 83.188.64.0/18/18
  54. 83.189.192.0/18/18
  55. 85.194.0.0/18/18
  56. 90.128.0.0/18/18
  57. 90.139.0.0/18/18
  58. 90.142.192.0/18/18
  59. 90.143.64.0/18/18
  60. 95.153.0.0/18/18
  61. 193.216.224.0/19/19
  62. 193.216.64.0/19/19
  63. 193.217.0.0/19/19
  64. 195.22.64.0/19/19
  65. 195.42.192.0/19/19
  66. 195.54.128.0/19/19
  67. 212.107.32.0/19/19
  68. 212.162.160.0/19/19
  69. 213.100.0.0/19/19
  70. 213.100.224.0/19/19
  71. 213.103.192.0/19/19
  72. 213.130.192.0/19/19
  73. 213.131.128.0/19/19
  74. 213.134.96.0/19/19
  75. 213.173.192.0/19/19
  76. 213.187.192.0/19/19
  77. 31.15.32.0/19/19
  78. 62.65.0.0/19/19
  79. 77.233.64.0/19/19
  80. 83.176.0.0/19/19
  81. 83.176.160.0/19/19
  82. 83.177.128.0/19/19
  83. 83.180.0.0/19/19
  84. 83.187.96.0/19/19
  85. 83.190.224.0/19/19
  86. 90.130.160.0/19/19
  87. 90.130.96.0/19/19
  88. 90.131.128.0/19/19
  89. 90.133.192.0/19/19
  90. 90.139.64.0/19/19
  91. 90.142.160.0/19/19
  92. 91.129.64.0/19/19
  93. 193.216.96.0/20/20
  94. 213.100.160.0/20/20
  95. 217.119.160.0/20/20
  96. 217.25.240.0/20/20
  97. 217.67.80.0/20/20
  98. 217.78.16.0/20/20
  99. 37.233.64.0/20/20
  100. 80.73.176.0/20/20
  101. 81.21.240.0/20/20
  102. 83.178.128.0/20/20
  103. 83.178.160.0/20/20
  104. 83.178.208.0/20/20
  105. 83.181.160.0/20/20
  106. 83.187.208.0/20/20
  107. 88.84.224.0/20/20
  108. 90.133.224.0/20/20
  109. 194.132.232.0/21/21
  110. 194.71.248.0/21/21
  111. 213.100.128.0/21/21
  112. 213.100.176.0/21/21
  113. 213.101.128.0/21/21
  114. 213.101.136.0/21/21
  115. 213.102.136.0/21/21
  116. 213.102.8.0/21/21
  117. 213.103.168.0/21/21
  118. 213.130.200.0/21/21
  119. 46.17.184.0/21/21
  120. 77.95.104.0/21/21
  121. 83.181.56.0/21/21
  122. 83.189.104.0/21/21
  123. 88.84.240.0/21/21
  124. 90.142.144.0/21/21
  125. 92.43.32.0/21/21
  126. 93.94.208.0/21/21
  127. 178.218.152.0/22/22
  128. 185.144.144.0/22/22
  129. 185.152.176.0/22/22
  130. 185.2.228.0/22/22
  131. 185.230.24.0/22/22
  132. 185.93.160.0/22/22
  133. 192.165.96.0/22/22
  134. 192.176.48.0/22/22
  135. 193.181.60.0/22/22
  136. 193.216.148.0/22/22
  137. 193.234.64.0/22/22
  138. 193.41.24.0/22/22
  139. 194.132.128.0/22/22
  140. 194.132.68.0/22/22
  141. 194.68.248.0/22/22
  142. 194.93.84.0/22/22
  143. 195.78.140.0/22/22
  144. 205.186.72.0/22/22
  145. 212.180.88.0/22/22
  146. 213.100.136.0/22/22
  147. 213.100.184.0/22/22
  148. 213.100.188.0/22/22
  149. 213.101.148.0/22/22
  150. 213.101.188.0/22/22
  151. 213.101.208.0/22/22
  152. 213.101.212.0/22/22
  153. 217.197.48.0/22/22
  154. 88.84.248.0/22/22
  155. 90.141.72.0/22/22
  156. 138.215.252.0/23/23
  157. 145.235.0.0/23/23
  158. 185.45.120.0/23/23
  159. 192.176.208.0/23/23
  160. 192.176.216.0/23/23
  161. 192.36.220.0/23/23
  162. 193.181.232.0/23/23
  163. 193.182.186.0/23/23
  164. 193.234.84.0/23/23
  165. 193.41.14.0/23/23
  166. 193.41.214.0/23/23
  167. 194.116.212.0/23/23
  168. 194.132.54.0/23/23
  169. 194.14.192.0/23/23
  170. 194.68.174.0/23/23
  171. 194.71.14.0/23/23
  172. 194.71.248.0/23/23
  173. 194.71.250.0/23/23
  174. 194.71.252.0/23/23
  175. 213.101.130.0/23/23
  176. 213.101.216.0/23/23
  177. 213.102.158.0/23/23
  178. 64.139.62.0/23/23
  179. 88.84.252.0/23/23
  180. 91.195.212.0/23/23
  181. 108.165.226.0/24/24
  182. 130.28.1.0/24/24
  183. 130.28.2.0/24/24
  184. 138.215.0.0/24/24
  185. 138.215.254.0/24/24
  186. 138.215.255.0/24/24
  187. 139.122.190.0/24/24
  188. 142.111.160.0/24/24
  189. 142.111.187.0/24/24
  190. 142.111.204.0/24/24
  191. 144.225.215.0/24/24
  192. 144.225.216.0/24/24
  193. 144.225.217.0/24/24
  194. 147.14.160.0/24/24
  195. 150.241.196.0/24/24
  196. 150.241.197.0/24/24
  197. 156.49.242.0/24/24
  198. 156.49.245.0/24/24
  199. 156.49.246.0/24/24
  200. 156.49.252.0/24/24
  201. 185.121.204.0/24/24
  202. 185.121.206.0/24/24
  203. 185.45.123.0/24/24
  204. 185.62.47.0/24/24
  205. 192.121.104.0/24/24
  206. 192.121.235.0/24/24
  207. 192.121.32.0/24/24
  208. 192.121.33.0/24/24
  209. 192.121.49.0/24/24
  210. 192.121.61.0/24/24
  211. 192.121.89.0/24/24
  212. 192.137.161.0/24/24
  213. 192.137.162.0/24/24
  214. 192.137.163.0/24/24
  215. 192.137.164.0/24/24
  216. 192.165.122.0/24/24
  217. 192.165.170.0/24/24
  218. 192.165.238.0/24/24
  219. 192.165.255.0/24/24
  220. 192.165.38.0/24/24
  221. 192.165.44.0/24/24
  222. 192.165.81.0/24/24
  223. 192.176.105.0/24/24
  224. 192.176.206.0/24/24
  225. 192.176.210.0/24/24
  226. 192.176.212.0/24/24
  227. 192.176.215.0/24/24
  228. 192.176.218.0/24/24
  229. 192.176.220.0/24/24
  230. 192.176.222.0/24/24
  231. 192.176.234.0/24/24
  232. 192.176.239.0/24/24
  233. 192.176.5.0/24/24
  234. 192.34.107.0/24/24
  235. 192.36.13.0/24/24
  236. 192.36.132.0/24/24
  237. 192.36.138.0/24/24
  238. 192.36.14.0/24/24
  239. 192.36.18.0/24/24
  240. 192.36.216.0/24/24
  241. 192.36.218.0/24/24
  242. 192.36.244.0/24/24
  243. 192.36.25.0/24/24
  244. 192.36.254.0/24/24
  245. 192.36.80.0/24/24
  246. 192.55.42.0/24/24
  247. 192.71.159.0/24/24
  248. 192.71.180.0/24/24
  249. 192.71.189.0/24/24
  250. 192.71.219.0/24/24
  251. 192.71.220.0/24/24
  252. 192.71.251.0/24/24
  253. 193.12.21.0/24/24
  254. 193.17.72.0/24/24
  255. 193.178.35.0/24/24
  256. 193.180.229.0/24/24
  257. 193.180.231.0/24/24
  258. 193.180.247.0/24/24
  259. 193.180.254.0/24/24
  260. 193.180.59.0/24/24
  261. 193.180.60.0/24/24
  262. 193.181.1.0/24/24
  263. 193.181.188.0/24/24
  264. 193.181.189.0/24/24
  265. 193.181.233.0/24/24
  266. 193.182.167.0/24/24
  267. 193.182.170.0/24/24
  268. 193.182.230.0/24/24
  269. 193.182.231.0/24/24
  270. 193.182.232.0/24/24
  271. 193.182.233.0/24/24
  272. 193.183.134.0/24/24
  273. 193.183.252.0/24/24
  274. 193.183.54.0/24/24
  275. 193.23.159.0/24/24
  276. 193.234.142.0/24/24
  277. 193.234.168.0/24/24
  278. 193.234.169.0/24/24
  279. 193.234.170.0/24/24
  280. 193.234.171.0/24/24
  281. 193.234.172.0/24/24
  282. 193.234.173.0/24/24
  283. 193.234.174.0/24/24
  284. 193.234.175.0/24/24
  285. 193.234.176.0/24/24
  286. 193.234.194.0/24/24
  287. 193.234.226.0/24/24
  288. 193.234.24.0/24/24
  289. 193.234.46.0/24/24
  290. 193.234.5.0/24/24
  291. 193.234.87.0/24/24
  292. 193.235.116.0/24/24
  293. 193.235.145.0/24/24
  294. 193.235.228.0/24/24
  295. 193.235.229.0/24/24
  296. 193.235.237.0/24/24
  297. 193.235.72.0/24/24
  298. 193.235.74.0/24/24
  299. 193.235.80.0/24/24
  300. 193.235.82.0/24/24
  301. 193.241.250.0/24/24
  302. 193.243.187.0/24/24
  303. 193.41.224.0/24/24
  304. 193.47.167.0/24/24
  305. 194.0.246.0/24/24
  306. 194.1.212.0/24/24
  307. 194.103.140.0/24/24
  308. 194.103.159.0/24/24
  309. 194.103.206.0/24/24
  310. 194.103.223.0/24/24
  311. 194.103.55.0/24/24
  312. 194.103.59.0/24/24
  313. 194.103.61.0/24/24
  314. 194.132.127.0/24/24
  315. 194.132.160.0/24/24
  316. 194.132.161.0/24/24
  317. 194.132.22.0/24/24
  318. 194.132.44.0/24/24
  319. 194.132.45.0/24/24
  320. 194.132.56.0/24/24
  321. 194.132.60.0/24/24
  322. 194.132.76.0/24/24
  323. 194.132.77.0/24/24
  324. 194.14.15.0/24/24
  325. 194.14.160.0/24/24
  326. 194.14.166.0/24/24
  327. 194.14.167.0/24/24
  328. 194.14.170.0/24/24
  329. 194.14.171.0/24/24
  330. 194.14.178.0/24/24
  331. 194.14.205.0/24/24
  332. 194.14.79.0/24/24
  333. 194.14.98.0/24/24
  334. 194.140.243.0/24/24
  335. 194.180.201.0/24/24
  336. 194.68.110.0/24/24
  337. 194.68.124.0/24/24
  338. 194.68.155.0/24/24
  339. 194.68.183.0/24/24
  340. 194.68.210.0/24/24
  341. 194.68.33.0/24/24
  342. 194.68.82.0/24/24
  343. 194.68.95.0/24/24
  344. 194.68.98.0/24/24
  345. 194.71.110.0/24/24
  346. 194.71.142.0/24/24
  347. 194.71.152.0/24/24
  348. 194.71.159.0/24/24
  349. 194.71.171.0/24/24
  350. 194.71.172.0/24/24
  351. 194.71.173.0/24/24
  352. 194.71.254.0/24/24
  353. 194.71.85.0/24/24
  354. 195.14.25.0/24/24
  355. 195.234.150.0/24/24
  356. 195.78.128.0/24/24
  357. 195.78.129.0/24/24
  358. 195.78.130.0/24/24
  359. 195.78.131.0/24/24
  360. 195.78.132.0/24/24
  361. 195.78.152.0/24/24
  362. 195.78.158.0/24/24
  363. 213.102.129.0/24/24
  364. 217.197.54.0/24/24
  365. 77.233.95.0/24/24
  366. 82.26.109.0/24/24
  367. 82.26.114.0/24/24
  368. 82.26.134.0/24/24
  369. 82.26.165.0/24/24
  370. 82.26.167.0/24/24
  371. 82.26.172.0/24/24
  372. 82.26.89.0/24/24
  373. 82.27.16.0/24/24
  374. 82.27.19.0/24/24
  375. 82.29.136.0/24/24
  376. 82.29.137.0/24/24
  377. 88.84.254.0/24/24
  378. 88.84.255.0/24/24
  379. 90.130.74.0/24/24
  380. 91.195.223.0/24/24
  381. 91.198.164.0/24/24
  382. 91.198.193.0/24/24
  383. 91.229.141.0/24/24
  384. 96.62.194.0/24/24
  385. 96.62.195.0/24/24
  386. 96.62.253.0/24/24
// IPv6 prefixes38
  1. 2a00:800::/25/25
  2. 2a04:ae00::/26/26
  3. 2001:6f0::/29/29
  4. 2a07:4040::/29/29
  5. 2a0a:3740::/29/29
  6. 2a00:807::/32/32
  7. 2a00:808::/32/32
  8. 2a00:809::/32/32
  9. 2a00:cc8::/32/32
  10. 2a01:1b8::/32/32
  11. 2001:678:54c::/48/48
  12. 2001:678:d5c::/48/48
  13. 2001:678:edc::/48/48
  14. 2001:67c:10c8::/48/48
  15. 2001:67c:10cc::/48/48
  16. 2001:67c:1118::/48/48
  17. 2001:67c:13f4::/48/48
  18. 2001:67c:1488::/48/48
  19. 2001:67c:15c8::/48/48
  20. 2001:67c:17bc::/48/48
  21. 2001:67c:17dc::/48/48
  22. 2001:67c:17f4::/48/48
  23. 2001:67c:189c::/48/48
  24. 2001:67c:1920::/48/48
  25. 2001:67c:22c8::/48/48
  26. 2001:67c:2650::/48/48
  27. 2001:67c:28c4::/48/48
  28. 2001:67c:2b24::/48/48
  29. 2001:67c:2bd4::/48/48
  30. 2001:67c:2c4c::/48/48
  31. 2001:67c:448::/48/48
  32. 2001:67c:488::/48/48
  33. 2001:67c:c20::/48/48
  34. 2a00:800:233::/48/48
  35. 2a00:800:428::/48/48
  36. 2a00:800:440::/48/48
  37. 2a01:280:390::/48/48
  38. 2a11:cd40:1000::/48/48
[ 03 ] — Notable peers & upstreams

Who it talks to.

203 observed neighbours
// Notable connections32 of 203 observed

Neighbours observed by RouteViews at 2026-11-06, 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
AS174 Cogent Communications, LLC —
AS1299 Arelion Sweden AB —
AS2497 — —
AS2799 — —
AS2914 NTT America, Inc. —
AS3166 — —
AS3303 — —
AS3306 — —
AS3332 — —
AS3491 PCCW Global (HK) Limited —
AS5411 — —
AS6453 Tata Communications (America) Inc. —
AS6762 Telecom Italia Sparkle S.p.A. —
AS6830 Liberty Global Europe Holding B.V. —
AS6939 Hurricane Electric LLC —
AS8240 — —
AS8368 — —
AS9002 — —
AS9201 — —
AS12552 — —
AS12597 — —
AS12757 — —
AS12935 — —
AS15912 — —
AS15991 — —
AS16255 — —
AS16642 — —
AS20861 — —
AS20943 — —
AS24819 — —
AS25037 — —
AS25181 — —
Neighbours observed via public BGP collectors; not a complete peering list.