subnet.im

AS22909Comcast Cable Communications, LLC

United StatesRegistryARIN

As of 14th November 2026, AS22909 (Comcast Cable Communications, LLC), a network registered in the United States with ARIN, originates 6 IPv4 prefixes covering 1.5k addresses and 47 IPv6 prefixes. By IPv4 address space that makes it the 31,786th-largest of the 80,840 networks we see originating IPv4, and the 7,215th-largest of 18,773 in the United States. It is seen behind 2 upstream networks, most often AS7922 (Comcast Cable Communications, LLC) and AS3356 (Lumen (Level 3)), and in front of 42 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

6

IPv6 prefixes

47

IPv4 addresses

1.5k

IPv6 /64s

3.1M

Upstream graph

The networks AS22909 is seen behind, one and two hops out, drawn from real AS paths.

AS22909Toward the internet core
Upstream graph for AS22909: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS22909Comcast Cable Com…This networkAS3356Lumen (Level 3)AS7922Comcast Cable Com…AS2914NTT America, Inc.AS3549Lumen (fka. Globa…AS1299Arelion (fka. Tel…AS6453TATA Communicatio…

Networks observed one and two hops upstream of AS22909 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

88

adjacent networks

Upstreams
22%
Peers
4450%
Downstreams
4248%

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

Upstreams of AS22909
NetworkCountryRelationshipPathsVantage pts
AS7922Comcast Cable Communications, LLCUSPeer6,437140
AS3356Lumen (Level 3)USPeer1,57831

Prefixes

All 53

The largest blocks AS22909 originates, widest first.

Largest prefixes originated by AS22909
PrefixAddressesVisibility
50.201.4.0/2425677/78
50.202.69.0/2425677/78
50.216.148.0/2425677/78
50.221.219.0/2425677/78
50.231.153.0/2425677/78
50.232.105.0/2425677/78
2001:559:15b::/4865.5k × /6463/64
2001:559:20b::/4865.5k × /6463/64
2001:559:245::/4865.5k × /6462/64
2001:559:286::/4865.5k × /6463/64

Routing health

How AS22909'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

  • Valid100.0%53
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%53
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 6 prefixes

IPv6 — 47 prefixes

  • /4865.5k × /64100.0%47

Recent changes

Announcements that started or stopped since 15th Oct 2026.

  • Withdrawn2001:559:5f5::/4822nd Oct 2026

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