subnet.im

AS33650Comcast Cable Communications, LLC

United StatesRegistryARIN

As of 10th November 2026, AS33650 (Comcast Cable Communications, LLC), a network registered in the United States with ARIN, originates 13 IPv4 prefixes covering 4.6k addresses and 107 IPv6 prefixes. By IPv4 address space that makes it the 16,466th-largest of the 80,733 networks we see originating IPv4, and the 4,625th-largest of 18,751 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 71 downstream networks. 98% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 98% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

13

IPv6 prefixes

107

IPv4 addresses

4.6k

IPv6 /64s

7M

Upstream graph

The networks AS33650 is seen behind, one and two hops out, drawn from real AS paths.

AS33650Toward the internet core
Upstream graph for AS33650: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS33650Comcast 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 AS33650 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

146

adjacent networks

Upstreams
21%
Peers
7350%
Downstreams
7149%

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

Upstreams of AS33650
NetworkCountryRelationshipPathsVantage pts
AS7922Comcast Cable Communications, LLCUSPeer10,551138
AS3356Lumen (Level 3)USPeer1,15853

Prefixes

All 120

The largest blocks AS33650 originates, widest first.

Largest prefixes originated by AS33650
PrefixAddressesVisibility
199.79.96.0/221k74/76
50.226.76.0/2351275/76
50.234.46.0/2351275/76
50.202.174.0/2425675/76
50.204.37.0/2425675/76
50.204.214.0/2425675/76
50.207.166.0/2425666/76
50.216.238.0/242561/76
50.222.54.0/2425675/76
50.238.166.0/2425675/76

Routing health

How AS33650'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 more97.5%117
  • Partially propagated40% to 90%1.7%2
  • Seen by few peersUnder 40%0.8%1

Prefix sizes

IPv4 — 13 prefixes

IPv6 — 107 prefixes

  • /4865.5k × /64100.0%107

Recent changes

Announcements that started or stopped since 12th Oct 2026.

12 announced and 12 withdrawn in all; the most recent are shown.

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