$ 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 47 104 IPv4 addresses, and supports IPv6. Its primary geographic footprint is in the United States. 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
October 21, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
82 / 78
IPv6 Prefixes (raw / aggregated)
201 / 181
IPv4 Addresses
47 104
Largest IPv4 Prefix
/18 (16 384 addresses)
Largest IPv6 Prefix
/46
Geolocated Countries
🇺🇸 United States (47 104 IPs)
Prefix Changed
October 21, 2026

Reputation

Reputation
Good — 1 flagged IPs out of 47 104 total (0.00%)

Connectivity Summary

Upstream Providers
1 upstream providing transit
Peers
1 network exchanging traffic without transit
Downstream Customers
251 downstreams buying transit
Unclassified
9 unclassified BGP neighbors
Degree
262 unique BGP neighbors
Reach
257 networks in customer cone

Upstream Providers (1)

  • AS3356 — LEVEL3 (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (82 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))
  • 107.0.96.0/23 (512 addresses (/23 prefix))
  • 107.1.102.0/23 (512 addresses (/23 prefix))
  • 205.167.202.0/23 (512 addresses (/23 prefix))
  • 24.104.47.0/24 (256 addresses (/24 prefix))
  • 50.201.119.0/24 (256 addresses (/24 prefix))
  • 50.201.191.0/24 (256 addresses (/24 prefix))
  • 50.202.73.0/24 (256 addresses (/24 prefix))
  • 50.203.174.0/24 (256 addresses (/24 prefix))
  • 50.203.242.0/24 (256 addresses (/24 prefix))
  • 50.204.23.0/24 (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))
  • 50.231.36.0/24 (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))
  • 50.232.176.0/24 (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))

IPv6 Prefixes (201 total)

  • 2001:559:228::/46
  • 2001:559:c19c::/46
  • 2001:559:7e::/47
  • 2001:559:b0::/47
  • 2001:559:222::/47
  • 2001:559:224::/47
  • 2001:559:22e::/47
  • 2001:559:230::/47
  • 2001:559:308::/47
  • 2001:559:4fa::/47
  • 2001:559:8050::/47
  • 2001:559:85b6::/47
  • 2001:559:c028::/47
  • 2001:559:c080::/47
  • 2001:559:c28c::/47
  • 2001:559:c4e4::/47
  • 2001:559:26::/48
  • 2001:559:2f::/48
  • 2001:559:35::/48
  • 2001:559:49::/48
  • 2001:559:bd::/48
  • 2001:559:be::/48
  • 2001:559:c9::/48
  • 2001:559:ca::/48
  • 2001:559:12d::/48
  • 2001:559:134::/48
  • 2001:559:146::/48
  • 2001:559:148::/48
  • 2001:559:15d::/48
  • 2001:559:1d6::/48
  • 2001:559:1e3::/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
  • 2001:559:24b::/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
  • 2001:559:311::/48
  • 2001:559:314::/48
  • 2001:559:32f::/48
  • 2001:559:39e::/48
  • 2001:559:3c2::/48
  • 2001:559:3c9::/48