AS7922 — COMCAST-7922

Network type: residential

AS7922 announces 3,455 IPv4 prefixes covering 42,064,384 addresses and 1,771 IPv6 prefixes.

About this network

Comcast's main Autonomous System, serving residential and business broadband (Xfinity) across large parts of the United States.

What it's used for

• Home and business internet access — this is an "eyeball" network full of end-user connections rather than servers.
• Comcast's own services and its large regional backbone.

Notable

• An IP in AS7922 almost always maps to a subscriber, so it is a normal source for consumer web browsing, gaming, and streaming — not hosting.
• Comcast operates one of the largest broadband footprints in the US and peers and caches heavily to keep popular content local.

Interesting

• Comcast was an early large-scale deployer of IPv6 to residential customers, driven by the exhaustion of IPv4 for its millions of subscribers.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 23.25.128.0/20
• 23.25.192.0/18
• 23.30.64.0/19
• 23.30.128.0/18
• 23.30.206.0/23
• 23.68.0.0/14
• 24.2.128.0/17
• 24.16.0.0/13
• 24.34.0.0/16
• 24.40.0.0/18
• 24.40.64.0/20
• 24.60.0.0/14
• 24.91.0.0/16
• 24.104.0.0/19
• 24.104.32.0/22
• 24.104.36.0/24
• 24.104.38.0/23
• 24.104.40.0/24
• 24.104.43.0/24
• 24.104.44.0/23
• 24.104.49.0/24
• 24.104.50.0/23
• 24.104.52.0/22
• 24.104.56.0/23
• 24.104.59.0/24
• 24.104.60.0/24
• 24.104.62.0/23
• 24.104.64.0/21
• 24.104.74.0/24
• 24.104.76.0/22
• 24.104.80.0/20
• 24.104.96.0/20
• 24.104.112.0/21
• 24.104.120.0/22
• 24.104.126.0/23
• 24.104.128.0/21
• 24.104.136.0/23
• 24.104.140.0/23
• 24.104.142.0/24
• 24.104.144.0/23
• 24.104.147.0/24
• 24.104.151.0/24
• 24.104.152.0/22
• 24.104.158.0/23
• 24.124.128.0/24
• 24.124.136.0/21
• 24.124.150.0/24
• 24.124.154.0/24
• 24.124.160.0/23
• 24.124.164.0/22
• 24.124.170.0/23
• 24.124.174.0/24
• 24.124.192.0/20
• 24.124.208.0/21
• 24.147.0.0/16
• 24.153.68.0/24
• 24.153.70.0/23
• 24.153.72.0/21
• 24.153.80.0/21
• 24.153.92.0/23
• 24.218.0.0/16
• 48.44.1.0/24
• 48.44.2.0/24
• 48.44.4.0/24
• 48.44.6.0/23
• 48.44.8.0/23
• 48.44.28.0/22
• 48.44.32.0/23
• 48.44.34.0/24
• 48.44.36.0/22
• 48.44.51.0/24
• 48.44.52.0/23
• 48.44.54.0/24
• 48.44.64.0/22
• 48.44.68.0/23
• 48.44.71.0/24
• 48.44.72.0/21
• 48.44.81.0/24
• 48.44.82.0/23
• 48.44.84.0/24
• 48.44.86.0/23
• 48.44.88.0/23
• 48.44.92.0/22
• 48.44.96.0/22
• 48.44.101.0/24
• 48.44.102.0/23
• 48.44.104.0/22
• 48.44.109.0/24
• 48.44.110.0/23
• 48.44.113.0/24
• 48.44.114.0/23
• 48.44.117.0/24
• 48.44.118.0/23
• 48.44.122.0/23
• 48.44.124.0/24
• 48.44.126.0/23
• 48.44.160.0/20
• 48.44.192.0/19
• 48.45.0.0/17
• 48.45.128.0/23

and 5,126 more.

Upstream networks

• AS174 Cogent Communications, LLC
• AS1299 Arelion Sweden AB
• AS6939 Hurricane Electric LLC
• AS3356 Level 3 Parent, LLC
• AS2914 NTT America, Inc.
• AS6453 TATA COMMUNICATIONS AMERICA INC
• AS3257 GTT Communications Inc.
• AS577 Bell Canada
• AS7018 AT&T Enterprises, LLC
• AS3491 PCCW Global HK Ltd.
• AS6762 TELECOM ITALIA SPARKLE S.p.A.
• AS1273 Vodafone Group PLC
• AS5511 Orange S.A.
• AS3320 Deutsche Telekom AG
• AS4637 Telstra Global
• AS2152 CENIC
• AS6830 Liberty Global Europe Holding B.V.
• AS852 Communications
• AS23352 DEFT.COM
• AS701 Verizon Business

Downstream networks

• AS7015 Comcast Cable Communications, LLC
• AS33287 Comcast Cable Communications, LLC
• AS33491 Comcast Cable Communications, LLC
• AS33651 Comcast Cable Communications, LLC
• AS33657 Comcast Cable Communications, LLC
• AS7016 Comcast Cable Communications, LLC
• AS33652 Comcast Cable Communications, LLC
• AS33659 Comcast Cable Communications, LLC
• AS7725 Comcast Cable Communications, LLC
• AS20214 Comcast Cable Communications, LLC
• AS33662 Comcast Cable Communications, LLC
• AS33650 Comcast Cable Communications, LLC
• AS46844 Sharktech
• AS33668 Comcast Cable Communications, LLC
• AS13649 Flexential Colorado Corp.
• AS33490 Comcast Cable Communications, LLC
• AS21508 Comcast Cable Communications, LLC
• AS33667 Comcast Cable Communications, LLC
• AS13367 Comcast Cable Communications, LLC
• AS33660 Comcast Cable Communications, LLC
• AS22909 Comcast Cable Communications, LLC
• AS33489 Comcast Cable Communications, LLC
• AS13335 Cloudflare, Inc.
• AS54113 Fastly, Inc.
• AS395610 Nexstar Broadcasting Inc.

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS1299 Arelion Sweden AB
• AS174 Cogent Communications, LLC
• AS7015 Comcast Cable Communications, LLC
• AS577 Bell Canada
• AS33491 Comcast Cable Communications, LLC
• AS60068 Datacamp Limited
• AS2914 NTT America, Inc.
• AS5511 Orange S.A.
• AS33287 Comcast Cable Communications, LLC
• AS33651 Comcast Cable Communications, LLC
• AS33657 Comcast Cable Communications, LLC
• AS7016 Comcast Cable Communications, LLC
• AS6453 TATA COMMUNICATIONS AMERICA INC
• AS852 Communications
• AS33652 Comcast Cable Communications, LLC
• AS2152 CENIC
• AS7018 AT&T Enterprises, LLC
• AS33668 Comcast Cable Communications, LLC
• AS7725 Comcast Cable Communications, LLC
• AS33659 Comcast Cable Communications, LLC
• AS3257 GTT Communications Inc.
• AS33667 Comcast Cable Communications, LLC
• AS33650 Comcast Cable Communications, LLC
• AS33662 Comcast Cable Communications, LLC

Routing security

• RPKI: 429 valid, 0 invalid and 2 not-found announcements; 776 ROAs.
• ASPA: none published.
• IRR: 38% of announcements registered; 650 route objects.
• Listed in as-sets: AS-10099, AS-17117IMPORT, AS-36193, AS-ACT-GLOBAL, AS-COMCAST-IBONE, AS-CTBC-CUSTOMERS109, AS-EBPROVIDERS, AS-FIBERFED-MIA, AS-FKBPROVIDERS, AS-FRANKLININSTITUTE, AS-GBLX, AS-GCI-UPSTREAM, AS-H5DATA-AS-SETPA01, AS-JCC-TORONTO-OH, AS-LEVEL3-IPV6, AS-OOWLPROVIDER, AS-TBMI-IRR-SET, AS-TMNET-CUSTOMERS, AS-TRANSIT-FREE-V4, AS-TRANSIT-FREE-V6, AS-ZITOMEDIA, AS-ZITOMEDIA, AS199746:AS-BLACKLIST, AS204464:AS-BLACKLIST, AS211757:AS-TRANSIT.