$ query “AS33657” --type=asn → 1 result(s)

AS33657 · CMCS

Comcast Cable Communications LLC

AS33657 is operated by Comcast Cable Communications LLC and serves as a major transit provider, registered in the United States since 2005. The system announces a respectable 11 776 IPv4 addresses, and supports IPv6. Its primary geographic footprint is in the United States. This AS's prefix announcements have been recently modified.

  • 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
May 12, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
30 / 29
IPv6 Prefixes (raw / aggregated)
242 / 223
IPv4 Addresses
11 776
Largest IPv4 Prefix
/20 (4 096 addresses)
Largest IPv6 Prefix
/47
Geolocated Countries
🇺🇸 United States (12 288 IPs)
Prefix Changed
May 12, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
2 upstreams providing transit
Downstream Customers
129 downstreams buying transit
Unclassified
12 unclassified BGP neighbors
Degree
143 unique BGP neighbors
Reach
142 networks in customer cone

Upstream Providers (2)

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

Prefix Lists

IPv4 Prefixes (30 total)

  • 69.67.80.0/20 (4 096 addresses (/20 prefix))
  • 50.223.158.0/23 (512 addresses (/23 prefix))
  • 192.110.220.0/23 (512 addresses (/23 prefix))
  • 50.232.184.0/24 (256 addresses (/24 prefix))
  • 50.235.236.0/24 (256 addresses (/24 prefix))
  • 50.204.128.0/24 (256 addresses (/24 prefix))
  • 50.205.74.0/24 (256 addresses (/24 prefix))
  • 50.207.162.0/24 (256 addresses (/24 prefix))
  • 50.216.214.0/24 (256 addresses (/24 prefix))
  • 50.219.87.0/24 (256 addresses (/24 prefix))
  • 50.203.251.0/24 (256 addresses (/24 prefix))
  • 50.224.212.0/24 (256 addresses (/24 prefix))
  • 50.232.109.0/24 (256 addresses (/24 prefix))
  • 50.232.173.0/24 (256 addresses (/24 prefix))
  • 50.201.252.0/24 (256 addresses (/24 prefix))
  • 50.235.98.0/24 (256 addresses (/24 prefix))
  • 50.204.116.0/24 (256 addresses (/24 prefix))
  • 50.236.38.0/24 (256 addresses (/24 prefix))
  • 50.236.234.0/24 (256 addresses (/24 prefix))
  • 50.238.112.0/24 (256 addresses (/24 prefix))
  • 50.238.163.0/24 (256 addresses (/24 prefix))
  • 50.239.232.0/24 (256 addresses (/24 prefix))
  • 50.202.155.0/24 (256 addresses (/24 prefix))
  • 76.78.2.0/24 (256 addresses (/24 prefix))
  • 107.1.101.0/24 (256 addresses (/24 prefix))
  • 50.202.117.0/24 (256 addresses (/24 prefix))
  • 192.189.235.0/24 (256 addresses (/24 prefix))
  • 199.249.199.0/24 (256 addresses (/24 prefix))
  • 208.87.105.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (242 total)

  • 2001:559:80fc::/47
  • 2001:559:2ca::/47
  • 2001:559:488::/47
  • 2001:559:8040::/47
  • 2001:559:80b0::/47
  • 2001:559:c42a::/47
  • 2001:559:c3f2::/47
  • 2001:559:c2b0::/47
  • 2001:559:c140::/47
  • 2001:559:c0c2::/47
  • 2001:559:8666::/47
  • 2001:559:865a::/47
  • 2001:559:8582::/47
  • 2001:559:857e::/47
  • 2001:559:25a::/47
  • 2001:559:8262::/47
  • 2001:559:8212::/47
  • 2001:559:816a::/47
  • 2001:559:8140::/47
  • 2001:559:840d::/48
  • 2001:559:7fe::/48
  • 2001:559:2b6::/48
  • 2001:559:2f3::/48
  • 2001:559:304::/48
  • 2001:559:30d::/48
  • 2001:559:319::/48
  • 2001:559:377::/48
  • 2001:559:3ba::/48
  • 2001:559:3ca::/48
  • 2001:559:3d2::/48
  • 2001:559:84af::/48
  • 2001:559:3eb::/48
  • 2001:559:3f1::/48
  • 2001:559:42c::/48
  • 2001:559:43a::/48
  • 2001:559:45a::/48
  • 2001:559:46c::/48
  • 2001:559:491::/48
  • 2001:559:4a0::/48
  • 2001:559:4a5::/48
  • 2001:559:4a8::/48
  • 2001:559:548::/48
  • 2001:559:574::/48
  • 2001:559:588::/48
  • 2001:559:5b7::/48
  • 2001:559:5cb::/48
  • 2001:559:5cd::/48
  • 2001:559:5d3::/48
  • 2001:559:5ef::/48
  • 2001:559:70d::/48