$ query “AS33490” --type=asn → 1 result(s)

AS33490 · COMCAST-33490

Comcast Cable Communications LLC

AS33490 is run by Comcast Cable Communications LLC and is a mid-size transit provider, established in the United States in 2004. The system announces a respectable 12 032 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to the United States, with additional presence in Japan and the United Kingdom, and a smaller footprint in another country.

  • Top 5% — Top 5% of all autonomous systems by reach and degree

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
December 30, 2004
Last Changed
April 01, 2026
Last Seen
October 21, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
22 / 20
IPv6 Prefixes (raw / aggregated)
60 / 52
IPv4 Addresses
12 032
Largest IPv4 Prefix
/20 (4 096 addresses)
Largest IPv6 Prefix
/47
Geolocated Countries
🇺🇸 United States (10 496 IPs), 🇯🇵 Japan (1 024 IPs), 🇬🇧 United Kingdom (256 IPs) and 1 more
Prefix Changed
September 22, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
1 upstream providing transit
Peers
2 networks exchanging traffic without transit
Downstream Customers
63 downstreams buying transit
Unclassified
2 unclassified BGP neighbors
Degree
68 unique BGP neighbors
Reach
64 networks in customer cone

Upstream Providers (1)

  • AS3356 — LEVEL3 (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (22 total)

  • 104.145.48.0/20 (4 096 addresses (/20 prefix))
  • 216.122.120.0/21 (2 048 addresses (/21 prefix))
  • 74.50.12.0/22 (1 024 addresses (/22 prefix))
  • 50.238.126.0/23 (512 addresses (/23 prefix))
  • 204.76.180.0/23 (512 addresses (/23 prefix))
  • 50.204.255.0/24 (256 addresses (/24 prefix))
  • 50.206.113.0/24 (256 addresses (/24 prefix))
  • 50.228.52.0/24 (256 addresses (/24 prefix))
  • 50.228.76.0/24 (256 addresses (/24 prefix))
  • 50.232.199.0/24 (256 addresses (/24 prefix))
  • 50.236.220.0/24 (256 addresses (/24 prefix))
  • 72.19.22.0/24 (256 addresses (/24 prefix))
  • 107.0.49.0/24 (256 addresses (/24 prefix))
  • 107.0.67.0/24 (256 addresses (/24 prefix))
  • 129.134.133.0/24 (256 addresses (/24 prefix))
  • 129.134.134.0/24 (256 addresses (/24 prefix))
  • 192.83.221.0/24 (256 addresses (/24 prefix))
  • 199.244.171.0/24 (256 addresses (/24 prefix))
  • 199.244.172.0/24 (256 addresses (/24 prefix))
  • 204.76.179.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (60 total)

  • 2001:559:f0::/47
  • 2001:559:8070::/47
  • 2001:559:8094::/47
  • 2001:559:875a::/47
  • 2001:559:c0ac::/47
  • 2001:559:c148::/47
  • 2001:559:c17c::/47
  • 2a03:2887:ff2c::/47
  • 2001:559:4::/48
  • 2001:559:20::/48
  • 2001:559:b3::/48
  • 2001:559:b4::/48
  • 2001:559:184::/48
  • 2001:559:29b::/48
  • 2001:559:29e::/48
  • 2001:559:2c2::/48
  • 2001:559:2e0::/48
  • 2001:559:336::/48
  • 2001:559:36a::/48
  • 2001:559:3e5::/48
  • 2001:559:3f0::/48
  • 2001:559:433::/48
  • 2001:559:434::/48
  • 2001:559:5aa::/48
  • 2001:559:711::/48
  • 2001:559:715::/48
  • 2001:559:79a::/48
  • 2001:559:7ea::/48
  • 2001:559:812b::/48
  • 2001:559:8164::/48
  • 2001:559:8186::/48
  • 2001:559:81fe::/48
  • 2001:559:82ca::/48
  • 2001:559:8388::/48
  • 2001:559:83f9::/48
  • 2001:559:8498::/48
  • 2001:559:84bd::/48
  • 2001:559:8500::/48
  • 2001:559:850f::/48
  • 2001:559:868e::/48
  • 2001:559:86b1::/48
  • 2001:559:c019::/48
  • 2001:559:c01a::/48
  • 2001:559:c040::/48
  • 2001:559:c0a9::/48
  • 2001:559:c0ab::/48
  • 2001:559:c153::/48
  • 2001:559:c1c2::/48
  • 2001:559:c2b9::/48
  • 2001:559:c46b::/48