subnet.im

AS33656Comcast Cable Communications, LLC

United StatesRegistryARIN

As of 11th November 2026, AS33656 (Comcast Cable Communications, LLC), a network registered in the United States with ARIN, originates 7 IPv6 prefixes. It is seen behind 1 upstream network, most often AS7922 (Comcast Cable Communications, LLC), and in front of 1 downstream network. 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

0

IPv6 prefixes

7

IPv4 addresses

0

IPv6 /64s

459k

Upstream graph

The networks AS33656 is seen behind, one and two hops out, drawn from real AS paths.

AS33656Toward the internet core
Upstream graph for AS33656: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS33656Comcast Cable Com…This networkAS7922Comcast Cable Com…AS1299Arelion (fka. Tel…AS6453TATA Communicatio…

Networks observed one and two hops upstream of AS33656 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

4

adjacent networks

Upstreams
125%
Peers
250%
Downstreams
125%

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

Upstreams of AS33656
NetworkCountryRelationshipPathsVantage pts
AS7922Comcast Cable Communications, LLCUSPeer502136

Prefixes

The largest blocks AS33656 originates, widest first.

Largest prefixes originated by AS33656
PrefixAddressesVisibility
2001:559:1e2::/4865.5k × /6461/63
2001:559:3ea::/4865.5k × /6461/63
2001:559:7ad::/4865.5k × /6461/63
2001:559:8197::/4865.5k × /6461/63
2001:559:84b6::/4865.5k × /6461/63
2001:559:c12f::/4865.5k × /6461/63
2001:559:c156::/4865.5k × /6461/63

Routing health

How AS33656'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%7
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%7
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv6 — 7 prefixes

  • /4865.5k × /64100.0%7

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS33656 started or stopped in this period.

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