$ query “AS33651” --type=asn → 1 result(s)

AS33651 — CMCS

Comcast Cable Communications LLC

AS33651 is a major transit provider registered to Comcast Cable Communications LLC, registered in the United States since 2005. The network announces a respectable 75 776 IPv4 addresses. Supports IPv6.

  • 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
February 16, 2005
Last Changed
March 04, 2026
Last Seen
March 04, 2026

Prefix Summary

IPv4 Prefixes (raw / aggregated)
92 / 87
IPv6 Prefixes (raw / aggregated)
209 / 189
IPv4 Addresses
75 776
Largest IPv4 Prefix
/18 (16 384 addresses)
Largest IPv6 Prefix
/29
Geolocated Countries
🇺🇸 US (82 IPs), 🇦🇺 AU (2 IPs), 🇻🇪 VE (2 IPs), 🇦🇹 AT, 🇩🇰 DK, 🇯🇵 JP, 🇧🇸 BS, 🇿🇿 ZZ, 🇱🇦 LA
Prefix Changed
March 04, 2026

Reputation

Reputation
Pristine — 0 flagged IPs out of 75 776 total (0.00%)

Connectivity Summary

Upstream Providers
2 upstream autonomous systems providing transit
Peers
0 autonomous systems exchanging traffic without transit fees
Downstream Customers
168 downstream autonomous systems buying transit
Degree
178 unique BGP neighbors (providers + customers + peers)
Reach
233 — customer cone size measuring network influence
Degree Rank
#763
Reach Rank
#798

Upstream Providers (2)

  • AS3356 — LEVEL3 (Tier-1 transit)
  • AS7922 — COMCAST-7922

Prefix Lists

IPv4 Prefixes (92 total)

  • 140.89.64.0/18 (16 384 addresses)
  • 9.142.96.0/19 (8 192 addresses)
  • 135.132.64.0/19 (8 192 addresses)
  • 9.142.48.0/20 (4 096 addresses)
  • 138.226.64.0/20 (4 096 addresses)
  • 45.58.232.0/21 (2 048 addresses)
  • 64.84.96.0/21 (2 048 addresses)
  • 64.84.120.0/21 (2 048 addresses)
  • 138.226.48.0/21 (2 048 addresses)
  • 138.226.112.0/21 (2 048 addresses)
  • 138.226.192.0/21 (2 048 addresses)
  • 198.145.136.0/22 (1 024 addresses)
  • 5.182.194.0/23 (512 addresses)
  • 24.104.72.0/23 (512 addresses)
  • 24.104.138.0/23 (512 addresses)
  • 50.201.8.0/23 (512 addresses)
  • 50.206.120.0/23 (512 addresses)
  • 50.235.20.0/23 (512 addresses)
  • 161.82.44.0/23 (512 addresses)
  • 169.230.76.0/23 (512 addresses)
  • 198.145.142.0/23 (512 addresses)
  • 5.182.186.0/24 (256 addresses)
  • 5.182.193.0/24 (256 addresses)
  • 24.104.150.0/24 (256 addresses)
  • 36.255.215.0/24 (256 addresses)
  • 45.67.141.0/24 (256 addresses)
  • 50.145.55.0/24 (256 addresses)
  • 50.200.170.0/24 (256 addresses)
  • 50.201.171.0/24 (256 addresses)
  • 50.204.119.0/24 (256 addresses)
  • 50.204.137.0/24 (256 addresses)
  • 50.205.226.0/24 (256 addresses)
  • 50.206.118.0/24 (256 addresses)
  • 50.206.219.0/24 (256 addresses)
  • 50.207.182.0/24 (256 addresses)
  • 50.207.190.0/24 (256 addresses)
  • 50.207.216.0/24 (256 addresses)
  • 50.216.23.0/24 (256 addresses)
  • 50.216.212.0/24 (256 addresses)
  • 50.218.46.0/24 (256 addresses)
  • 50.219.139.0/24 (256 addresses)
  • 50.222.26.0/24 (256 addresses)
  • 50.222.50.0/24 (256 addresses)
  • 50.222.102.0/24 (256 addresses)
  • 50.224.7.0/24 (256 addresses)
  • 50.227.120.0/24 (256 addresses)
  • 50.227.186.0/24 (256 addresses)
  • 50.228.12.0/24 (256 addresses)
  • 50.228.130.0/24 (256 addresses)
  • 50.228.223.0/24 (256 addresses)

IPv6 Prefixes (209 total)

  • 2a0c:1900::/29
  • 2620:10a:6000::/44
  • 2001:559:9c::/47
  • 2001:559:1c0::/47
  • 2001:559:8342::/47
  • 2001:559:8542::/47
  • 2001:559:8584::/47
  • 2001:559:85a2::/47
  • 2001:559:85f4::/47
  • 2001:559:8614::/47
  • 2001:559:8632::/47
  • 2001:559:8646::/47
  • 2001:559:865e::/47
  • 2001:559:8660::/47
  • 2001:559:86a8::/47
  • 2001:559:86dc::/47
  • 2001:559:86e4::/47
  • 2001:559:86f4::/47
  • 2001:559:c00a::/47
  • 2001:559:c00e::/47
  • 2001:559:c0e4::/47
  • 2001:559:c522::/47
  • 2001:559:e::/48
  • 2001:559:4e::/48
  • 2001:559:6b::/48
  • 2001:559:6e::/48
  • 2001:559:77::/48
  • 2001:559:78::/48
  • 2001:559:9e::/48
  • 2001:559:a4::/48
  • 2001:559:c1::/48
  • 2001:559:f3::/48
  • 2001:559:104::/48
  • 2001:559:106::/48
  • 2001:559:17e::/48
  • 2001:559:197::/48
  • 2001:559:1ed::/48
  • 2001:559:20e::/48
  • 2001:559:218::/48
  • 2001:559:21a::/48
  • 2001:559:24f::/48
  • 2001:559:259::/48
  • 2001:559:262::/48
  • 2001:559:295::/48
  • 2001:559:2ac::/48
  • 2001:559:2dd::/48
  • 2001:559:2e6::/48
  • 2001:559:305::/48
  • 2001:559:329::/48
  • 2001:559:340::/48