subnet.im

AS33662Comcast Cable Communications, LLC

United StatesRegistryARIN

As of 27th September 2026, AS33662 (Comcast Cable Communications, LLC), a network registered in the United States with ARIN, originates 15 IPv4 prefixes covering 3.8k addresses and 105 IPv6 prefixes. By IPv4 address space that makes it the 18,604th-largest of the 79,525 networks we see originating IPv4, and the 5,122nd-largest of 18,428 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 55 downstream networks. 98% of its announcements have 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

15

IPv6 prefixes

105

IPv4 addresses

3.8k

IPv6 /64s

6.9M

Upstream graph

The networks AS33662 is seen behind, one and two hops out, drawn from real AS paths.

AS33662Toward the internet core
Upstream graph for AS33662: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS33662Comcast Cable Com…This networkAS3356Lumen (Level 3)AS7922Comcast Cable Com…AS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS1299Arelion (fka. Tel…

Networks observed one and two hops upstream of AS33662 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

114

adjacent networks

Upstreams
22%
Peers
5750%
Downstreams
5548%

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

Upstreams of AS33662
NetworkCountryRelationshipPathsVantage pts
AS7922Comcast Cable Communications, LLCUSPeer11,868145
AS3356Lumen (Level 3)USPeer1,57461

Prefixes

All 120

The largest blocks AS33662 originates, widest first.

Largest prefixes originated by AS33662
PrefixAddressesVisibility
24.104.75.0/2425680/81
50.201.112.0/2425680/81
50.217.18.0/2425680/81
50.220.66.0/2425680/81
50.228.10.0/2425680/81
50.228.194.0/2425680/81
50.231.217.0/2425680/81
50.232.18.0/2425680/81
50.232.206.0/2425680/81
50.234.8.0/2425680/81

Routing health

How AS33662'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

  • Valid98.3%118
  • Invalid0.0%0
  • No ROA1.7%2

Propagation

  • Globally propagated90% of full-feed peers or more100.0%120
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 15 prefixes

IPv6 — 105 prefixes

  • /4865.5k × /64100.0%105

Recent changes

Announcements that started or stopped since 28th Aug 2026.

  • Announced2001:559:852e::/4822nd Sept 2026
  • Withdrawn107.1.148.0/2421st Sept 2026
  • Withdrawn2001:559:83af::/4821st Sept 2026
  • Withdrawn2001:559:852e::/4821st Sept 2026

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