Autonomous system detail

AS7922

Announced

Operated by COMCAST-7922 - Comcast Cable Communications, LLC.

Summary

// analyst note
Default assumption for a 7922 IP is a US residential broadband subscriber; treat with dynamic-IP/CGNAT caution and avoid durable attribution.
// security note
Residential/eyeball space — dynamic IP reassignment (73.x/96.x) and CGNAT (100.64.0.0/10) in some areas; an IP can map to different subscribers over time.
IPv4 prefixes
407
~68.3M addresses
IPv6 prefixes
5
announced
Peer networks
143
30 up · 118 down
IANA block
7723-8191
Assigned by ARIN
[ 01 ] — Context

About this ASN.

Updated  ·  Confidence: High

AS7922 is the principal autonomous system of Comcast Cable Communications, the largest residential broadband provider in the United States, marketed as XFINITY. Registered under ARIN since February 1997, it anchors an eyeball network serving on the order of 31 million domestic broadband customers, so the default assumption for an address in this ASN is a US residential subscriber. The network announces several hundred prefixes of its own and many more once customer space is counted, with an originated IPv4 footprint in the tens of millions of addresses; common consumer ranges include 73.x and 96.x, and carrier-grade NAT (100.64.0.0/10) appears in some markets. Comcast also runs supporting infrastructure — its network hosts an anycast instance of ICANN's L-root (l.root-servers.net), announcing ICANN's 199.7.83.0/24 from AS7922; the root server itself is operated by ICANN (from AS20144), not by Comcast. Comcast peers selectively, requiring a traffic ratio and a contract rather than peering on shared public switches. For triage, the key caveat is dynamic IP reassignment: a given address can map to different subscribers over time, and behind CGNAT a single IP can represent many homes, so attribution must be per-IP and timestamped. No carrier-specific abuse listing of note was found as of June 2026; per-IP reputation can still vary widely from the parent ASN.

Operator
Comcast Cable Communications, LLC (ARIN OrgId CCCS) [Confirmed] — ARIN RDAP/WHOIS
Country / RIR
US, ARIN [Confirmed] — ARIN RDAP
Allocated
1997-02-14 (ARIN ASN RegDate) [Confirmed] — ARIN RDAP
Org status
active — corporate.comcast.com

Security/abuse context

residential/eyeball space — dynamic IP reassignment (e.g., 73.x/96.x) and CGNAT (100.64.0.0/10) in some areas, so an IP can map to different subscribers over time; consumer-NAT and infected-home-PC considerations apply per-IP and dated. No carrier-specific abuse listing of note as of 2026-06-04

Network & routing

Our research recorded 700 IPv4 prefixes; RIPEstat currently announces 407.
Network type
ISP-eyeball (largest US residential ISP) + some backbone [Confirmed] — PeeringDB + CAIDA
Size
~673–750 IPv4 prefixes originated (~3,485 total; ~10,249 announced incl. customers), ~77 IPv6; ~15.4M–68.3M IPv4 addresses (registered vs announced); downstream cone ~2,655 — BigDataCloud / bgp.he.net / bgp.tools (2026-05/06)
Routing/peering
~202–246 peers; ~8 upstreams; selective peering (ratio + contract required; not on shared public switches) — peeringdb.com
Notable usage
largest US residential broadband network (XFINITY); ~31M domestic broadband customers per Comcast Q1 2026 filing; hosts an anycast instance of ICANN's L-root (announces 199.7.83.0/24 for l.root-servers.net from AS7922; ICANN operates L-root itself via AS20144) — corporate.comcast.com, peeringdb.com/net/822
Related ASNs
additional Comcast ASNs (e.g., AS33650, AS33651, AS33652)
Analyst note
Default assumption for a 7922 IP is a US residential broadband subscriber; treat with dynamic-IP/CGNAT caution and avoid durable attribution.
[ 02 ] — Announced prefixes

What this network routes.

412 prefixes total · RIPEstat data · cached, not real-time
// IPv4 prefixes407
  1. 73.0.0.0/8/8
  2. 50.128.0.0/9/9
  3. 98.192.0.0/10/10
  4. 96.192.0.0/11/11
  5. 67.160.0.0/11/11
  6. 96.64.0.0/11/11
  7. 98.32.0.0/11/11
  8. 68.32.0.0/11/11
  9. 76.96.0.0/11/11
  10. 174.160.0.0/11/11
  11. 96.128.0.0/11/11
  12. 76.128.0.0/11/11
  13. 24.0.0.0/12/12
  14. 71.224.0.0/12/12
  15. 76.16.0.0/12/12
  16. 74.16.0.0/12/12
  17. 174.48.0.0/12/12
  18. 69.240.0.0/12/12
  19. 71.192.0.0/12/12
  20. 184.112.0.0/12/12
  21. 96.96.0.0/12/12
  22. 75.144.0.0/13/13
  23. 68.80.0.0/13/13
  24. 75.64.0.0/13/13
  25. 71.56.0.0/13/13
  26. 24.16.0.0/13/13
  27. 173.8.0.0/13/13
  28. 96.112.0.0/13/13
  29. 173.160.0.0/13/13
  30. 69.136.0.0/13/13
  31. 24.60.0.0/14/14
  32. 184.108.0.0/14/14
  33. 74.92.0.0/14/14
  34. 107.0.0.0/14/14
  35. 71.24.0.0/14/14
  36. 70.88.0.0/14/14
  37. 50.76.0.0/14/14
  38. 162.148.0.0/14/14
  39. 96.120.0.0/14/14
  40. 23.68.0.0/14/14
  41. 69.180.0.0/15/15
  42. 24.98.0.0/15/15
  43. 23.24.0.0/15/15
  44. 66.176.0.0/15/15
  45. 75.72.0.0/15/15
  46. 23.30.0.0/15/15
  47. 24.130.0.0/15/15
  48. 24.126.0.0/15/15
  49. 107.4.0.0/15/15
  50. 66.30.0.0/15/15
  51. 66.229.0.0/16/16
  52. 24.128.0.0/16/16
  53. 198.0.0.0/16/16
  54. 24.125.0.0/16/16
  55. 172.244.0.0/16/16
  56. 65.96.0.0/16/16
  57. 147.191.0.0/16/16
  58. 24.34.0.0/16/16
  59. 66.41.0.0/16/16
  60. 50.73.0.0/16/16
  61. 24.118.0.0/16/16
  62. 165.137.0.0/16/16
  63. 24.218.0.0/16/16
  64. 24.91.0.0/16/16
  65. 96.124.0.0/16/16
  66. 169.152.0.0/16/16
  67. 75.74.0.0/16/16
  68. 162.17.0.0/16/16
  69. 24.147.0.0/16/16
  70. 24.129.0.0/17/17
  71. 24.124.128.0/17/17
  72. 24.104.0.0/17/17
  73. 65.34.128.0/17/17
  74. 24.30.0.0/17/17
  75. 72.55.0.0/17/17
  76. 216.45.128.0/17/17
  77. 75.75.0.0/17/17
  78. 48.46.128.0/18/18
  79. 48.47.128.0/18/18
  80. 66.56.0.0/18/18
  81. 24.245.0.0/18/18
  82. 48.46.0.0/18/18
  83. 24.40.0.0/18/18
  84. 66.208.192.0/18/18
  85. 48.45.64.0/18/18
  86. 208.39.128.0/18/18
  87. 209.23.192.0/18/18
  88. 66.240.0.0/18/18
  89. 75.75.128.0/18/18
  90. 48.45.0.0/19/19
  91. 24.104.128.0/19/19
  92. 74.81.128.0/19/19
  93. 64.139.64.0/19/19
  94. 64.56.32.0/19/19
  95. 48.46.192.0/19/19
  96. 24.153.64.0/19/19
  97. 65.97.0.0/19/19
  98. 48.47.192.0/19/19
  99. 48.45.48.0/20/20
  100. 48.44.160.0/20/20
  101. 48.46.240.0/20/20
  102. 24.40.64.0/20/20
  103. 48.45.32.0/20/20
  104. 48.46.192.0/21/21
  105. 48.46.208.0/21/21
  106. 48.44.192.0/21/21
  107. 48.47.224.0/21/21
  108. 48.46.168.0/21/21
  109. 48.47.240.0/21/21
  110. 48.46.32.0/21/21
  111. 48.45.40.0/21/21
  112. 48.45.24.0/21/21
  113. 48.44.72.0/21/21
  114. 48.46.240.0/21/21
  115. 48.45.88.0/21/21
  116. 198.178.8.0/21/21
  117. 48.46.232.0/21/21
  118. 48.45.80.0/21/21
  119. 48.46.128.0/21/21
  120. 48.46.144.0/21/21
  121. 48.47.100.0/22/22
  122. 48.46.96.0/22/22
  123. 48.44.92.0/22/22
  124. 48.45.8.0/22/22
  125. 48.46.20.0/22/22
  126. 48.44.96.0/22/22
  127. 48.45.20.0/22/22
  128. 140.99.132.0/22/22
  129. 48.46.84.0/22/22
  130. 48.47.216.0/22/22
  131. 48.46.120.0/22/22
  132. 48.47.72.0/22/22
  133. 48.47.204.0/22/22
  134. 48.46.8.0/22/22
  135. 48.44.204.0/22/22
  136. 48.46.24.0/22/22
  137. 48.45.16.0/22/22
  138. 48.46.92.0/22/22
  139. 48.44.28.0/22/22
  140. 48.44.200.0/22/22
  141. 48.46.76.0/22/22
  142. 48.44.64.0/22/22
  143. 48.47.92.0/22/22
  144. 48.46.104.0/22/22
  145. 48.46.4.0/22/22
  146. 48.44.216.0/22/22
  147. 48.47.24.0/22/22
  148. 48.47.64.0/22/22
  149. 48.47.200.0/22/22
  150. 48.44.36.0/22/22
  151. 48.44.208.0/22/22
  152. 48.45.72.0/22/22
  153. 48.46.188.0/22/22
  154. 48.47.212.0/22/22
  155. 48.46.0.0/22/22
  156. 48.47.80.0/22/22
  157. 216.122.112.0/22/22
  158. 48.46.12.0/22/22
  159. 48.46.184.0/22/22
  160. 48.44.220.0/22/22
  161. 48.47.220.0/22/22
  162. 48.46.180.0/22/22
  163. 48.47.52.0/22/22
  164. 48.46.112.0/22/22
  165. 48.47.208.0/22/22
  166. 48.45.68.0/22/22
  167. 48.47.8.0/22/22
  168. 216.122.116.0/22/22
  169. 48.47.252.0/22/22
  170. 48.45.232.0/22/22
  171. 48.46.44.0/22/22
  172. 48.47.36.0/22/22
  173. 48.47.120.0/22/22
  174. 48.47.124.0/22/22
  175. 48.46.56.0/22/22
  176. 48.47.108.0/22/22
  177. 48.44.104.0/22/22
  178. 48.46.28.0/22/22
  179. 48.47.16.0/22/22
  180. 48.46.252.0/22/22
  181. 204.11.116.0/22/22
  182. 48.44.212.0/22/22
  183. 48.45.204.0/22/22
  184. 48.46.16.0/22/22
  185. 48.47.232.0/23/23
  186. 48.47.96.0/23/23
  187. 48.44.68.0/23/23
  188. 48.47.58.0/23/23
  189. 48.44.114.0/23/23
  190. 48.46.88.0/23/23
  191. 48.45.0.0/23/23
  192. 48.45.12.0/23/23
  193. 48.44.122.0/23/23
  194. 48.44.6.0/23/23
  195. 48.46.248.0/23/23
  196. 48.46.60.0/23/23
  197. 48.46.66.0/23/23
  198. 48.47.60.0/23/23
  199. 48.46.178.0/23/23
  200. 48.44.32.0/23/23
  201. 48.46.124.0/23/23
  202. 48.45.14.0/23/23
  203. 48.45.156.0/23/23
  204. 173.214.184.0/23/23
  205. 48.47.88.0/23/23
  206. 48.45.2.0/23/23
  207. 48.46.48.0/23/23
  208. 48.47.86.0/23/23
  209. 48.46.102.0/23/23
  210. 48.47.78.0/23/23
  211. 48.44.110.0/23/23
  212. 48.47.50.0/23/23
  213. 48.46.108.0/23/23
  214. 48.45.180.0/23/23
  215. 48.45.34.0/23/23
  216. 48.47.4.0/23/23
  217. 48.47.32.0/23/23
  218. 48.44.102.0/23/23
  219. 48.45.32.0/23/23
  220. 48.46.250.0/23/23
  221. 48.45.66.0/23/23
  222. 198.137.252.0/23/23
  223. 48.45.64.0/23/23
  224. 48.44.118.0/23/23
  225. 48.46.62.0/23/23
  226. 48.44.8.0/23/23
  227. 48.47.68.0/23/23
  228. 48.44.126.0/23/23
  229. 48.46.72.0/23/23
  230. 48.44.88.0/23/23
  231. 48.47.30.0/23/23
  232. 48.46.40.0/23/23
  233. 48.47.2.0/23/23
  234. 48.47.46.0/23/23
  235. 48.45.38.0/23/23
  236. 48.44.86.0/23/23
  237. 48.46.54.0/23/23
  238. 48.45.228.0/23/23
  239. 48.44.52.0/23/23
  240. 48.46.176.0/23/23
  241. 48.45.78.0/23/23
  242. 48.47.40.0/23/23
  243. 48.45.132.0/23/23
  244. 48.45.172.0/23/23
  245. 48.47.114.0/23/23
  246. 48.46.82.0/23/23
  247. 48.46.42.0/23/23
  248. 48.46.68.0/23/23
  249. 48.45.176.0/23/23
  250. 48.45.166.0/23/23
  251. 48.46.116.0/23/23
  252. 48.45.250.0/23/23
  253. 48.45.188.0/23/23
  254. 48.44.82.0/23/23
  255. 48.45.76.0/23/23
  256. 48.45.216.0/23/23
  257. 48.46.50.0/23/23
  258. 48.46.52.0/23/23
  259. 48.47.44.0/23/23
  260. 48.47.234.0/23/23
  261. 174.140.228.0/23/23
  262. 48.45.148.0/23/23
  263. 48.47.22.0/23/23
  264. 48.47.116.0/23/23
  265. 48.47.12.0/23/23
  266. 48.45.36.0/23/23
  267. 48.45.210.0/23/23
  268. 48.47.106.0/23/23
  269. 48.47.248.0/23/23
  270. 66.93.47.0/24/24
  271. 48.45.136.0/24/24
  272. 68.167.56.0/24/24
  273. 48.47.76.0/24/24
  274. 48.47.6.0/24/24
  275. 48.45.247.0/24/24
  276. 48.44.101.0/24/24
  277. 48.44.71.0/24/24
  278. 72.244.152.0/24/24
  279. 48.45.143.0/24/24
  280. 66.253.76.0/24/24
  281. 48.47.113.0/24/24
  282. 48.45.128.0/24/24
  283. 74.49.227.0/24/24
  284. 48.45.171.0/24/24
  285. 48.45.190.0/24/24
  286. 48.44.81.0/24/24
  287. 66.93.182.0/24/24
  288. 48.47.1.0/24/24
  289. 48.45.252.0/24/24
  290. 66.93.43.0/24/24
  291. 48.45.187.0/24/24
  292. 48.44.4.0/24/24
  293. 48.47.118.0/24/24
  294. 48.47.29.0/24/24
  295. 48.47.20.0/24/24
  296. 72.244.144.0/24/24
  297. 74.49.244.0/24/24
  298. 48.46.71.0/24/24
  299. 48.45.240.0/24/24
  300. 48.46.101.0/24/24
  301. 207.180.15.0/24/24
  302. 68.167.58.0/24/24
  303. 48.45.153.0/24/24
  304. 66.93.180.0/24/24
  305. 68.167.57.0/24/24
  306. 48.46.65.0/24/24
  307. 48.45.253.0/24/24
  308. 48.47.57.0/24/24
  309. 74.49.240.0/24/24
  310. 207.180.54.0/24/24
  311. 48.44.54.0/24/24
  312. 48.45.159.0/24/24
  313. 48.45.160.0/24/24
  314. 205.234.234.0/24/24
  315. 48.45.230.0/24/24
  316. 48.44.2.0/24/24
  317. 140.99.210.0/24/24
  318. 48.45.137.0/24/24
  319. 66.93.183.0/24/24
  320. 48.45.244.0/24/24
  321. 48.47.85.0/24/24
  322. 48.45.131.0/24/24
  323. 48.45.243.0/24/24
  324. 48.44.124.0/24/24
  325. 48.45.238.0/24/24
  326. 48.45.185.0/24/24
  327. 48.45.161.0/24/24
  328. 48.44.1.0/24/24
  329. 48.47.34.0/24/24
  330. 140.99.127.0/24/24
  331. 66.253.72.0/24/24
  332. 72.244.146.0/24/24
  333. 48.45.163.0/24/24
  334. 48.45.237.0/24/24
  335. 68.167.26.0/24/24
  336. 48.45.147.0/24/24
  337. 48.47.90.0/24/24
  338. 209.101.249.0/24/24
  339. 216.246.7.0/24/24
  340. 48.44.51.0/24/24
  341. 48.45.227.0/24/24
  342. 48.46.127.0/24/24
  343. 207.180.9.0/24/24
  344. 216.246.28.0/24/24
  345. 48.44.117.0/24/24
  346. 209.101.250.0/24/24
  347. 204.93.173.0/24/24
  348. 48.46.91.0/24/24
  349. 66.93.46.0/24/24
  350. 48.45.141.0/24/24
  351. 48.45.152.0/24/24
  352. 48.45.129.0/24/24
  353. 66.93.181.0/24/24
  354. 48.46.119.0/24/24
  355. 209.101.248.0/24/24
  356. 48.47.43.0/24/24
  357. 72.244.138.0/24/24
  358. 48.44.113.0/24/24
  359. 140.99.79.0/24/24
  360. 48.47.99.0/24/24
  361. 48.45.179.0/24/24
  362. 48.45.145.0/24/24
  363. 48.45.245.0/24/24
  364. 68.167.27.0/24/24
  365. 48.45.215.0/24/24
  366. 48.47.48.0/24/24
  367. 48.47.71.0/24/24
  368. 50.220.178.0/24/24
  369. 48.45.255.0/24/24
  370. 66.253.77.0/24/24
  371. 48.45.168.0/24/24
  372. 48.45.135.0/24/24
  373. 66.93.45.0/24/24
  374. 48.45.208.0/24/24
  375. 48.45.241.0/24/24
  376. 48.44.109.0/24/24
  377. 48.45.218.0/24/24
  378. 68.167.24.0/24/24
  379. 74.49.242.0/24/24
  380. 68.167.59.0/24/24
  381. 48.45.212.0/24/24
  382. 216.246.102.0/24/24
  383. 48.45.144.0/24/24
  384. 48.45.213.0/24/24
  385. 74.49.246.0/24/24
  386. 48.45.175.0/24/24
  387. 48.44.84.0/24/24
  388. 140.99.77.0/24/24
  389. 207.180.8.0/24/24
  390. 48.47.62.0/24/24
  391. 140.99.49.0/24/24
  392. 48.45.155.0/24/24
  393. 209.101.251.0/24/24
  394. 48.45.184.0/24/24
  395. 48.45.246.0/24/24
  396. 48.45.183.0/24/24
  397. 48.46.81.0/24/24
  398. 66.253.78.0/24/24
  399. 48.45.249.0/24/24
  400. 48.45.169.0/24/24
  401. 48.45.139.0/24/24
  402. 48.47.15.0/24/24
  403. 205.234.162.0/24/24
  404. 68.167.25.0/24/24
  405. 48.47.104.0/24/24
  406. 48.44.34.0/24/24
  407. 157.254.215.0/24/24
// IPv6 prefixes5
  1. 2601::/20/20
  2. 2603:2000::/20/20
  3. 2603:3000::/24/24
  4. 2001:558::/29/29
  5. 2620:fd:8000::/48/48
[ 03 ] — Notable peers & upstreams

Who it talks to.

143 observed neighbours
// Notable connectionsTop 20 of 143
ASNOperatorRole
AS1299 TWELVE99 Arelion Sweden AB upstream
AS174 COGENT-174 - Cogent Communications, LLC upstream
AS2914 NTT-DATA-2914 - NTT America, Inc. upstream
AS6453 AS6453 - TATA COMMUNICATIONS (AMERICA) INC upstream
AS6939 HURRICANE - Hurricane Electric LLC upstream
AS6762 SEABONE-NET TELECOM ITALIA SPARKLE S.p.A. upstream
AS5511 Opentransit Orange S.A. upstream
AS3257 GTT-BACKBONE GTT Communications Inc. upstream
AS3320 DTAG Deutsche Telekom AG upstream
AS6461 ZAYO-6461 - Zayo Bandwidth upstream
AS6830 LibertyGlobal Liberty Global Europe Holding B.V. upstream
AS3356 LEVEL3 - Level 3 Parent, LLC upstream
AS3491 PCCWG-APAC-HK - PCCW Global (HK) Ltd. upstream
AS12956 TELXIUS TELEFONICA GLOBAL SOLUTIONS SL upstream
AS2516 KDDI - KDDI CORPORATION upstream
AS4637 ASN-TELSTRA-GLOBAL - Telstra Global upstream
AS577 BACOM - Bell Canada upstream
AS17676 GIGAINFRA - SoftBank Corp. upstream
AS701 UUNET - Verizon Business upstream
AS286 KPN GTT Communications Inc. upstream
Neighbours observed via public BGP collectors; not a complete peering list.