$ query “AS33661” --type=asn → 1 result(s)

AS33661 — CMCS

Comcast Cable Communications LLC

AS33661 is a mid-size transit provider registered to Comcast Cable Communications LLC, registered in the United States since 2005. The network announces 1 792 IPv4 addresses. Supports IPv6.

Basic Information

Country
🇺🇸 United States
Category
Internet Service Provider
Network Role
Mid-size Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
February 16, 2005
Last Changed
March 04, 2026
Last Seen
March 05, 2026

Prefix Summary

IPv4 Prefixes (raw / aggregated)
7 / 7
IPv6 Prefixes (raw / aggregated)
16 / 16
IPv4 Addresses
1 792
Largest IPv4 Prefix
/24 (256 addresses)
Largest IPv6 Prefix
/48
Geolocated Countries
🇺🇸 US (7 IPs)
Prefix Changed
March 04, 2026

Reputation

Reputation
Pristine — 0 flagged IPs out of 1 792 total (0.00%)

Connectivity Summary

Upstream Providers
1 upstream autonomous systems providing transit
Peers
0 autonomous systems exchanging traffic without transit fees
Downstream Customers
18 downstream autonomous systems buying transit
Degree
21 unique BGP neighbors (providers + customers + peers)
Reach
23 — customer cone size measuring network influence
Degree Rank
#7 349
Reach Rank
#2 142

Upstream Providers (1)

Prefix Lists

IPv4 Prefixes (7 total)

  • 50.218.97.0/24 (256 addresses)
  • 50.220.33.0/24 (256 addresses)
  • 50.226.0.0/24 (256 addresses)
  • 50.227.97.0/24 (256 addresses)
  • 50.228.116.0/24 (256 addresses)
  • 50.236.155.0/24 (256 addresses)
  • 50.237.76.0/24 (256 addresses)

IPv6 Prefixes (16 total)

  • 2001:559:135::/48
  • 2001:559:4ed::/48
  • 2001:559:4ee::/48
  • 2001:559:731::/48
  • 2001:559:82f9::/48
  • 2001:559:830d::/48
  • 2001:559:8320::/48
  • 2001:559:8462::/48
  • 2001:559:85d6::/48
  • 2001:559:864f::/48
  • 2001:559:878c::/48
  • 2001:559:87d4::/48
  • 2001:559:c202::/48
  • 2001:559:c22b::/48
  • 2001:559:c4b9::/48
  • 2001:559:c4ea::/48