subnet.im

AS7922Comcast Cable Communications, LLC

United StatesRegistryARINTypeEyeball

As of 13th October 2026, AS7922 (Comcast Cable Communications, LLC), an access network registered in the United States with ARIN, originates 426 IPv4 prefixes covering 68.3M addresses and 11 IPv6 prefixes. By IPv4 address space that makes it the 8th-largest of the 79,585 networks we see originating IPv4, and the 6th-largest of 18,443 in the United States. It is seen behind 26 upstream networks, most often AS1299 (Arelion (fka. Telia Carrier)) and AS2914 (NTT America, Inc.), and in front of 122 downstream networks. 98% of its announcements have a valid RPKI ROA; 6 are RPKI-invalid. 99% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

426

IPv6 prefixes

11

IPv4 addresses

68.3M

IPv6 /64s

36.3T

Upstream graph

The networks AS7922 is seen behind, one and two hops out, drawn from real AS paths.

AS7922Toward the internet core
Upstream graph for AS7922: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS7922Comcast Cable Com…This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS6453TATA Communicatio…AS6939Hurricane Electri…AS151326DCConnect Communi…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS38880Micron21 Datacent…AS49544i3D.net B.VAS8220COLTAS35280F5 Networks SARL

Networks observed one and two hops upstream of AS7922 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

345

adjacent networks

Upstreams
268%
Peers
19757%
Downstreams
12235%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS7922
NetworkCountryRelationshipPathsVantage pts
AS1299Arelion (fka. Telia Carrier)SEPeer80,35754
AS2914NTT America, Inc.USPeer71,85751
AS6453TATA Communications (America) IncUSPeer57,09456
AS174Cogent Communications, LLCUSPeer28,74540
AS6939Hurricane Electric LLCUSPeer27,45219
AS3257GTT Communications Inc.USPeer21,72023
AS3491PCCW Global (HK) Ltd.HKPeer20,59111
AS6762Telecom Italia Sparkle (Seabone)ITPeer18,45823
AS3356Lumen (Level 3)USPeer13,14645
AS49544i3D.net B.VNLPeer10,6342

Prefixes

All 437

The largest blocks AS7922 originates, widest first.

Largest prefixes originated by AS7922
PrefixAddressesVisibility
73.0.0.0/816.8M79/81
50.128.0.0/98.4M80/81
98.192.0.0/104.2M78/81
67.160.0.0/112.1M79/81
68.32.0.0/112.1M79/81
76.96.0.0/112.1M78/81
76.128.0.0/112.1M79/81
96.64.0.0/112.1M79/81
96.128.0.0/112.1M79/81
96.192.0.0/112.1M79/81

Routing health

How AS7922's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid98.2%429
  • Invalid1.4%6
  • No ROA0.5%2

Propagation

  • Globally propagated90% of full-feed peers or more98.6%431
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%1.4%6

Prefix sizes

IPv4 — 426 prefixes

IPv6 — 11 prefixes

  • /2017.6T × /6418.2%2
  • /241.1T × /649.1%1
  • /2934.4B × /649.1%1
  • /4865.5k × /6463.6%7

Recent changes

Announcements that started or stopped since 13th Sept 2026.

26 announced and 0 withdrawn in all; the most recent are shown.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.