$ query “AS33491” --type=asn → 1 result(s)

AS33491 · COMCAST-33491

Comcast Cable Communications LLC

AS33491 is operated by Comcast Cable Communications LLC and serves as a major transit provider, based in the United States since 2004. The system announces a respectable 49 664 IPv4 addresses, and supports IPv6. The bulk of its IP address space is in the United States, with additional presence in Australia. This AS has recently updated its prefix announcements.

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

Basic Information

Country
🇺🇸 United States
Category
Internet Service Provider
Network Role
Major Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
December 30, 2004
Last Changed
March 04, 2026
Last Seen
April 28, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
91 / 86
IPv6 Prefixes (raw / aggregated)
212 / 190
IPv4 Addresses
49 664
Largest IPv4 Prefix
/18 (16 384 addresses)
Largest IPv6 Prefix
/46
Geolocated Countries
🇺🇸 United States (41 472 IPs), 🇦🇺 Australia (8 448 IPs)
Prefix Changed
April 24, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
3 upstreams providing transit
Downstream Customers
251 downstreams buying transit
Unclassified
5 unclassified BGP neighbors
Degree
259 unique BGP neighbors
Reach
289 networks in customer cone

Upstream Providers (3)

Prefix Lists

IPv4 Prefixes (91 total)

  • 209.153.0.0/18 (16 384 addresses (/18 prefix))
  • 164.68.64.0/19 (8 192 addresses (/19 prefix))
  • 50.220.4.0/22 (1 024 addresses (/22 prefix))
  • 50.229.76.0/22 (1 024 addresses (/22 prefix))
  • 50.205.54.0/23 (512 addresses (/23 prefix))
  • 50.220.130.0/23 (512 addresses (/23 prefix))
  • 50.224.140.0/23 (512 addresses (/23 prefix))
  • 205.167.202.0/23 (512 addresses (/23 prefix))
  • 199.5.60.0/23 (512 addresses (/23 prefix))
  • 107.1.102.0/23 (512 addresses (/23 prefix))
  • 107.0.182.0/23 (512 addresses (/23 prefix))
  • 107.0.96.0/23 (512 addresses (/23 prefix))
  • 50.232.176.0/24 (256 addresses (/24 prefix))
  • 50.237.12.0/24 (256 addresses (/24 prefix))
  • 50.204.189.0/24 (256 addresses (/24 prefix))
  • 50.205.166.0/24 (256 addresses (/24 prefix))
  • 50.206.250.0/24 (256 addresses (/24 prefix))
  • 50.207.233.0/24 (256 addresses (/24 prefix))
  • 50.216.36.0/24 (256 addresses (/24 prefix))
  • 50.216.227.0/24 (256 addresses (/24 prefix))
  • 50.217.237.0/24 (256 addresses (/24 prefix))
  • 50.218.78.0/24 (256 addresses (/24 prefix))
  • 50.219.59.0/24 (256 addresses (/24 prefix))
  • 50.219.60.0/24 (256 addresses (/24 prefix))
  • 50.220.44.0/24 (256 addresses (/24 prefix))
  • 50.220.116.0/24 (256 addresses (/24 prefix))
  • 50.220.188.0/24 (256 addresses (/24 prefix))
  • 50.224.45.0/24 (256 addresses (/24 prefix))
  • 50.224.194.0/24 (256 addresses (/24 prefix))
  • 50.225.88.0/24 (256 addresses (/24 prefix))
  • 50.227.239.0/24 (256 addresses (/24 prefix))
  • 50.228.97.0/24 (256 addresses (/24 prefix))
  • 50.230.91.0/24 (256 addresses (/24 prefix))
  • 50.230.112.0/24 (256 addresses (/24 prefix))
  • 50.231.36.0/24 (256 addresses (/24 prefix))
  • 50.231.52.0/24 (256 addresses (/24 prefix))
  • 50.231.119.0/24 (256 addresses (/24 prefix))
  • 50.231.218.0/24 (256 addresses (/24 prefix))
  • 50.231.221.0/24 (256 addresses (/24 prefix))
  • 50.232.93.0/24 (256 addresses (/24 prefix))
  • 50.232.95.0/24 (256 addresses (/24 prefix))
  • 50.232.142.0/24 (256 addresses (/24 prefix))
  • 50.204.23.0/24 (256 addresses (/24 prefix))
  • 50.232.195.0/24 (256 addresses (/24 prefix))
  • 50.233.216.0/24 (256 addresses (/24 prefix))
  • 50.233.247.0/24 (256 addresses (/24 prefix))
  • 50.234.21.0/24 (256 addresses (/24 prefix))
  • 50.234.141.0/24 (256 addresses (/24 prefix))
  • 50.235.155.0/24 (256 addresses (/24 prefix))
  • 50.204.91.0/24 (256 addresses (/24 prefix))
  • and 36 more

IPv6 Prefixes (212 total)

  • 2001:559:c19c::/46
  • 2001:559:228::/46
  • 2001:559:224::/47
  • 2001:559:c028::/47
  • 2001:559:22e::/47
  • 2001:559:c4e4::/47
  • 2001:559:c28c::/47
  • 2001:559:b0::/47
  • 2001:559:c080::/47
  • 2001:559:222::/47
  • 2001:559:8648::/47
  • 2001:559:85b6::/47
  • 2001:559:7e::/47
  • 2001:559:8050::/47
  • 2001:559:766::/47
  • 2001:559:4fa::/47
  • 2001:559:308::/47
  • 2001:559:230::/47
  • 2001:559:81e7::/48
  • 2001:559:87bc::/48
  • 2001:559:1e5::/48
  • 2001:559:1fc::/48
  • 2001:559:1ff::/48
  • 2001:559:204::/48
  • 2001:559:221::/48
  • 2001:559:226::/48
  • 2001:559:22d::/48
  • 2001:559:1d6::/48
  • 2001:559:15d::/48
  • 2001:559:24b::/48
  • 2001:559:24c::/48
  • 2001:559:27b::/48
  • 2001:559:2a5::/48
  • 2001:559:2d1::/48
  • 2001:559:2e3::/48
  • 2001:559:303::/48
  • 2001:559:148::/48
  • 2001:559:311::/48
  • 2001:559:314::/48
  • 2001:559:32f::/48
  • 2001:559:346::/48
  • 2001:559:348::/48
  • 2001:559:34a::/48
  • 2001:559:39e::/48
  • 2001:559:3c2::/48
  • 2001:559:3c9::/48
  • 2001:559:3cb::/48
  • 2001:559:3ee::/48
  • 2001:559:3fa::/48
  • 2001:559:408::/48
  • and 140 more