subnet.im

AS33659Comcast Cable Communications, LLC

United StatesRegistryARIN

As of 10th November 2026, AS33659 (Comcast Cable Communications, LLC), a network registered in the United States with ARIN, originates 58 IPv4 prefixes covering 40.2k addresses and 124 IPv6 prefixes. By IPv4 address space that makes it the 4,970th-largest of the 80,733 networks we see originating IPv4, and the 1,733rd-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 89 downstream networks. 88% of its announcements have a valid RPKI ROA; 9 are RPKI-invalid. 85% of its routes reach at least 90% of full-feed peers, and 17 prefixes are also originated by another network.

At a glance

IPv4 prefixes

58

IPv6 prefixes

124

IPv4 addresses

40.2k

IPv6 /64s

8.1M

Upstream graph

The networks AS33659 is seen behind, one and two hops out, drawn from real AS paths.

AS33659Toward the internet core
Upstream graph for AS33659: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS33659Comcast 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 AS33659 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

185

adjacent networks

Upstreams
21%
Peers
9451%
Downstreams
8948%

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

Upstreams of AS33659
NetworkCountryRelationshipPathsVantage pts
AS7922Comcast Cable Communications, LLCUSPeer11,945138
AS3356Lumen (Level 3)USPeer3,14056

Prefixes

All 182

The largest blocks AS33659 originates, widest first.

Largest prefixes originated by AS33659
PrefixAddressesVisibility
9.142.0.0/198.2k76/76
138.226.0.0/204.1k76/76
138.226.88.0/212k76/76
170.100.192.0/212k76/76
24.75.216.0/221k18/76
45.150.168.0/221k1/76
45.151.196.0/221k1/76
64.52.28.0/221k63/76
64.93.84.0/221k1/76
64.112.8.0/221k1/76

Routing health

How AS33659'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

  • Valid88.5%161
  • Invalid4.9%9
  • No ROA6.6%12

Propagation

  • Globally propagated90% of full-feed peers or more85.2%155
  • Partially propagated40% to 90%7.7%14
  • Seen by few peersUnder 40%7.1%13

Prefix sizes

IPv4 — 58 prefixes

IPv6 — 124 prefixes

  • /4865.5k × /64100.0%124

Recent changes

Announcements that started or stopped since 12th Oct 2026.

13 announced and 6 withdrawn in all; the most recent are shown.

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