Autonomous system detail

AS1237

Announced

AS1237 announces 212 IPv4 and 1 IPv6 prefixes and peers with 43 other networks.

Summary

// analyst note
Routing counts are a combined observation from route-views2 and route-views6 at 2026-11-03T14:00:00.000Z; sampled AS_PATH neighbours are not verified peers or commercial relationships.
// security note
Observed routing alone does not establish ownership, deployment, traffic use, or safety.
IPv4 prefixes
212
~306.9K addresses
IPv6 prefixes
1
announced
Peer networks
43
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

AS1237 had 212 IPv4 prefixes and one IPv6 prefix visible in the combined Route Views snapshot at 2026-11-03 14:00 UTC. The supplied evidence does not identify the ASN’s operator, organization, country, service, or website, so its identity and purpose remain unknown. The snapshot reports 299,776 IPv4 addresses represented by those prefixes; that is a routing estimate, not evidence of assignment, ownership, deployment, or traffic use.

The observation combines route-views2 and route-views6 data. It records 43 AS_PATH neighbours, with 32 ASNs shown in the supplied sample. Those adjacencies do not establish verified peering sessions or commercial upstream, customer, or provider relationships. For an investigation, compare the observed prefixes and paths with the specific address or event under review, then seek independent first-party evidence linking an organization to AS1237 before assigning identity or purpose. This single snapshot cannot establish longer-term routing behavior.

Identity
Operator and intended use are unknown from the supplied evidence.
Routing
212 IPv4 prefixes and one IPv6 prefix were observed in the combined snapshot at 2026-11-03 14:00 UTC.
Triage
Treat the observed prefixes and paths as leads for comparison; they do not establish ownership, deployment, traffic, or safety.

Network & routing

Routing observation time
2026-11-03 14:00 UTC, combined across route-views2 and route-views6 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
ASN
1237 [Confirmed] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv
Allocating RIR
ARIN [Confirmed] — https://www.iana.org/assignments/as-numbers/as-numbers-1.csv
IPv4 prefix count
212 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
IPv4 address estimate
299776 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
IPv6 prefix count
1 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
Observed AS_PATH neighbour count
43 [Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
Observed AS_PATH neighbour sample
AS1704, AS1781, AS2385, AS3784, AS4766, AS7560, AS7564, AS9275, AS9317, AS9488, AS9489, AS9637, AS9686, AS9695, AS9949, AS10052, AS10063, AS10070, AS10162, AS10187, AS17579, AS17595, AS17856, AS17866, AS18026, AS18034, AS18297, AS18298, AS18336, AS23596, AS24026, AS38426
[Confirmed] — https://archive.routeviews.org/route-views2/bgpdata/2026.11/RIBS/rib.20261103.1400.bz2
[ 02 ] — Announced prefixes

What this network routes.

213 prefixes total · as observed by RouteViews at 2026-11-06 · one collector view, not a global census
// IPv4 prefixes212
  1. 134.75.0.0/16/16
  2. 150.183.0.0/16/16
  3. 203.250.192.0/18/18
  4. 203.250.0.0/19/19
  5. 210.119.64.0/19/19
  6. 203.247.192.0/20/20
  7. 203.253.96.0/20/20
  8. 203.254.176.0/20/20
  9. 210.107.160.0/20/20
  10. 210.110.144.0/20/20
  11. 210.119.48.0/20/20
  12. 210.125.32.0/20/20
  13. 147.47.120.0/21/21
  14. 203.230.24.0/21/21
  15. 203.230.64.0/21/21
  16. 203.241.40.0/21/21
  17. 203.250.112.0/21/21
  18. 203.250.160.0/21/21
  19. 203.250.176.0/21/21
  20. 203.250.96.0/21/21
  21. 210.107.152.0/21/21
  22. 210.110.128.0/21/21
  23. 210.110.224.0/21/21
  24. 210.117.240.0/21/21
  25. 210.119.40.0/21/21
  26. 210.125.56.0/21/21
  27. 210.125.64.0/21/21
  28. 210.218.208.0/21/21
  29. 210.219.56.0/21/21
  30. 210.98.48.0/21/21
  31. 202.30.40.0/22/22
  32. 202.30.60.0/22/22
  33. 203.230.108.0/22/22
  34. 203.230.60.0/22/22
  35. 203.230.76.0/22/22
  36. 203.230.8.0/22/22
  37. 203.241.120.0/22/22
  38. 203.247.160.0/22/22
  39. 203.247.172.0/22/22
  40. 203.247.176.0/22/22
  41. 203.247.216.0/22/22
  42. 203.250.156.0/22/22
  43. 203.250.172.0/22/22
  44. 203.253.136.0/22/22
  45. 203.253.140.0/22/22
  46. 210.107.248.0/22/22
  47. 210.110.192.0/22/22
  48. 210.110.236.0/22/22
  49. 210.117.248.0/22/22
  50. 210.119.96.0/22/22
  51. 210.218.216.0/22/22
  52. 210.219.36.0/22/22
  53. 210.219.48.0/22/22
  54. 210.98.28.0/22/22
  55. 210.98.60.0/22/22
  56. 210.98.8.0/22/22
  57. 134.75.52.0/23/23
  58. 203.230.116.0/23/23
  59. 203.230.16.0/23/23
  60. 203.230.22.0/23/23
  61. 203.230.74.0/23/23
  62. 203.241.116.0/23/23
  63. 203.241.170.0/23/23
  64. 203.241.172.0/23/23
  65. 203.247.164.0/23/23
  66. 203.247.170.0/23/23
  67. 203.247.180.0/23/23
  68. 203.247.190.0/23/23
  69. 203.253.224.0/23/23
  70. 203.253.230.0/23/23
  71. 203.253.234.0/23/23
  72. 203.254.168.0/23/23
  73. 210.107.252.0/23/23
  74. 210.110.196.0/23/23
  75. 210.110.206.0/23/23
  76. 210.110.254.0/23/23
  77. 210.114.104.0/23/23
  78. 210.117.210.0/23/23
  79. 210.117.214.0/23/23
  80. 210.117.226.0/23/23
  81. 210.117.228.0/23/23
  82. 210.117.238.0/23/23
  83. 210.117.252.0/23/23
  84. 210.119.100.0/23/23
  85. 210.119.114.0/23/23
  86. 210.119.122.0/23/23
  87. 210.119.124.0/23/23
  88. 210.119.20.0/23/23
  89. 210.119.36.0/23/23
  90. 210.125.84.0/23/23
  91. 210.218.202.0/23/23
  92. 210.218.204.0/23/23
  93. 210.218.206.0/23/23
  94. 210.219.34.0/23/23
  95. 210.219.40.0/23/23
  96. 210.219.62.0/23/23
  97. 210.98.14.0/23/23
  98. 210.98.24.0/23/23
  99. 210.98.6.0/23/23
  100. 134.75.20.0/24/24
  101. 134.75.250.0/24/24
  102. 147.47.124.0/24/24
  103. 147.47.125.0/24/24
  104. 150.183.11.0/24/24
  105. 202.31.182.0/24/24
  106. 203.230.0.0/24/24
  107. 203.230.116.0/24/24
  108. 203.230.120.0/24/24
  109. 203.230.126.0/24/24
  110. 203.230.2.0/24/24
  111. 203.230.3.0/24/24
  112. 203.230.6.0/24/24
  113. 203.230.7.0/24/24
  114. 203.230.72.0/24/24
  115. 203.230.73.0/24/24
  116. 203.233.155.0/24/24
  117. 203.233.156.0/24/24
  118. 203.241.118.0/24/24
  119. 203.241.164.0/24/24
  120. 203.241.165.0/24/24
  121. 203.241.169.0/24/24
  122. 203.241.174.0/24/24
  123. 203.247.167.0/24/24
  124. 203.247.184.0/24/24
  125. 203.247.185.0/24/24
  126. 203.247.187.0/24/24
  127. 203.247.188.0/24/24
  128. 203.247.64.0/24/24
  129. 203.247.69.0/24/24
  130. 203.247.73.0/24/24
  131. 203.250.110.0/24/24
  132. 203.250.155.0/24/24
  133. 203.250.156.0/24/24
  134. 203.250.182.0/24/24
  135. 203.250.183.0/24/24
  136. 203.253.135.0/24/24
  137. 203.253.226.0/24/24
  138. 203.253.236.0/24/24
  139. 203.253.238.0/24/24
  140. 203.254.175.0/24/24
  141. 203.254.179.0/24/24
  142. 203.254.180.0/24/24
  143. 203.254.181.0/24/24
  144. 203.254.185.0/24/24
  145. 203.254.186.0/24/24
  146. 203.254.40.0/24/24
  147. 210.107.144.0/24/24
  148. 210.107.146.0/24/24
  149. 210.107.254.0/24/24
  150. 210.110.143.0/24/24
  151. 210.110.182.0/24/24
  152. 210.110.183.0/24/24
  153. 210.110.184.0/24/24
  154. 210.110.189.0/24/24
  155. 210.110.190.0/24/24
  156. 210.110.191.0/24/24
  157. 210.110.198.0/24/24
  158. 210.110.205.0/24/24
  159. 210.110.232.0/24/24
  160. 210.110.235.0/24/24
  161. 210.110.252.0/24/24
  162. 210.114.106.0/24/24
  163. 210.114.108.0/24/24
  164. 210.117.192.0/24/24
  165. 210.117.193.0/24/24
  166. 210.117.194.0/24/24
  167. 210.117.197.0/24/24
  168. 210.117.198.0/24/24
  169. 210.117.208.0/24/24
  170. 210.117.209.0/24/24
  171. 210.117.211.0/24/24
  172. 210.117.212.0/24/24
  173. 210.117.216.0/24/24
  174. 210.117.217.0/24/24
  175. 210.117.218.0/24/24
  176. 210.117.219.0/24/24
  177. 210.117.224.0/24/24
  178. 210.117.225.0/24/24
  179. 210.117.230.0/24/24
  180. 210.117.236.0/24/24
  181. 210.119.113.0/24/24
  182. 210.119.116.0/24/24
  183. 210.119.126.0/24/24
  184. 210.119.37.0/24/24
  185. 210.119.71.0/24/24
  186. 210.119.72.0/24/24
  187. 210.125.0.0/24/24
  188. 210.125.107.0/24/24
  189. 210.125.69.0/24/24
  190. 210.218.192.0/24/24
  191. 210.218.201.0/24/24
  192. 210.218.203.0/24/24
  193. 210.219.32.0/24/24
  194. 210.219.42.0/24/24
  195. 210.219.45.0/24/24
  196. 210.219.47.0/24/24
  197. 210.219.52.0/24/24
  198. 210.219.55.0/24/24
  199. 210.219.62.0/24/24
  200. 210.98.12.0/24/24
  201. 210.98.26.0/24/24
  202. 210.98.44.0/24/24
  203. 210.98.47.0/24/24
  204. 210.98.48.0/24/24
  205. 210.98.5.0/24/24
  206. 210.98.52.0/24/24
  207. 210.98.54.0/24/24
  208. 210.98.56.0/24/24
  209. 210.98.59.0/24/24
  210. 211.213.190.0/24/24
  211. 218.233.7.0/24/24
  212. 218.234.156.0/24/24
// IPv6 prefixes1
  1. 2001:320::/32/32
[ 03 ] — Notable peers & upstreams

Who it talks to.

43 observed neighbours
// Notable connections32 of 43 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
AS1704 — —
AS1781 — —
AS2385 — —
AS3784 — —
AS4766 — —
AS7560 — —
AS7564 — —
AS9275 — —
AS9317 — —
AS9488 — —
AS9489 — —
AS9637 — —
AS9686 — —
AS9695 — —
AS9949 — —
AS10052 — —
AS10063 — —
AS10070 — —
AS10162 — —
AS10187 — —
AS17579 — —
AS17595 — —
AS17856 — —
AS17866 — —
AS18026 — —
AS18034 — —
AS18297 — —
AS18298 — —
AS18336 — —
AS23596 — —
AS24026 — —
AS38426 — —
Neighbours observed via public BGP collectors; not a complete peering list.