subnet.im

AS33650Comcast Cable Communications, LLC

United StatesRegistryARIN

As of 26th September 2026, AS33650 (Comcast Cable Communications, LLC), a network registered in the United States with ARIN, originates 12 IPv4 prefixes covering 4.4k addresses and 108 IPv6 prefixes. By IPv4 address space that makes it the 16,612th-largest of the 79,516 networks we see originating IPv4, and the 4,667th-largest of 18,424 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 70 downstream networks. 98% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. Over 99% 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

12

IPv6 prefixes

108

IPv4 addresses

4.4k

IPv6 /64s

7.1M

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: 5 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…AS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS1299Arelion (fka. Tel…

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

144

adjacent networks

Upstreams
21%
Peers
7250%
Downstreams
7049%

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

Upstreams of AS33650
NetworkCountryRelationshipPathsVantage pts
AS7922Comcast Cable Communications, LLCUSPeer11,202145
AS3356Lumen (Level 3)USPeer1,21561

Prefixes

All 120

The largest blocks AS33650 originates, widest first.

Largest prefixes originated by AS33650
PrefixAddressesVisibility
199.79.96.0/221k79/81
50.226.76.0/2351280/81
50.234.46.0/2351280/81
50.202.174.0/2425680/81
50.204.37.0/2425680/81
50.204.214.0/2425680/81
50.207.166.0/2425668/81
50.222.54.0/2425680/81
50.238.166.0/2425680/81
50.238.235.0/2425680/81

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 more99.2%119
  • Partially propagated40% to 90%0.8%1
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 12 prefixes

IPv6 — 108 prefixes

  • /4865.5k × /64100.0%108

Recent changes

Announcements that started or stopped since 28th Aug 2026.

  • Withdrawn2001:559:80c0::/4821st Sept 2026
  • Withdrawn50.216.238.0/2421st Sept 2026

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