$ query “AS33668” --type=asn → 1 result(s)

AS33668 · CMCS

Comcast Cable Communications LLC

AS33668 is owned by Comcast Cable Communications LLC and is a major transit provider, established in the United States in 2005. The system announces 6 912 IPv4 addresses, and supports IPv6. The bulk of its IP address space is in the United States.

  • 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
April 29, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
27 / 27
IPv6 Prefixes (raw / aggregated)
69 / 66
IPv4 Addresses
6 912
Largest IPv4 Prefix
/24 (256 addresses)
Largest IPv6 Prefix
/47
Geolocated Countries
🇺🇸 United States (7 168 IPs)
Prefix Changed
April 05, 2026

Reputation

Reputation
Pristine — 0 flagged IPs

Connectivity Summary

Upstream Providers
3 upstreams providing transit
Downstream Customers
71 downstreams buying transit
Unclassified
1 unclassified BGP neighbor
Degree
75 unique BGP neighbors
Reach
36 621 networks in customer cone

Upstream Providers (3)

Prefix Lists

IPv4 Prefixes (27 total)

  • 50.202.125.0/24 (256 addresses (/24 prefix))
  • 50.203.250.0/24 (256 addresses (/24 prefix))
  • 50.204.170.0/24 (256 addresses (/24 prefix))
  • 50.206.127.0/24 (256 addresses (/24 prefix))
  • 50.207.92.0/24 (256 addresses (/24 prefix))
  • 50.217.249.0/24 (256 addresses (/24 prefix))
  • 50.220.170.0/24 (256 addresses (/24 prefix))
  • 50.221.158.0/24 (256 addresses (/24 prefix))
  • 50.223.155.0/24 (256 addresses (/24 prefix))
  • 50.226.70.0/24 (256 addresses (/24 prefix))
  • 50.227.241.0/24 (256 addresses (/24 prefix))
  • 50.228.137.0/24 (256 addresses (/24 prefix))
  • 50.229.7.0/24 (256 addresses (/24 prefix))
  • 50.232.15.0/24 (256 addresses (/24 prefix))
  • 50.233.62.0/24 (256 addresses (/24 prefix))
  • 50.233.114.0/24 (256 addresses (/24 prefix))
  • 50.238.250.0/24 (256 addresses (/24 prefix))
  • 50.239.133.0/24 (256 addresses (/24 prefix))
  • 107.0.213.0/24 (256 addresses (/24 prefix))
  • 157.240.130.0/24 (256 addresses (/24 prefix))
  • 157.240.135.0/24 (256 addresses (/24 prefix))
  • 192.88.105.0/24 (256 addresses (/24 prefix))
  • 192.138.205.0/24 (256 addresses (/24 prefix))
  • 198.180.251.0/24 (256 addresses (/24 prefix))
  • 198.199.172.0/24 (256 addresses (/24 prefix))
  • 206.201.156.0/24 (256 addresses (/24 prefix))
  • 206.201.158.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (69 total)

  • 2001:559:25c::/47
  • 2001:559:817a::/47
  • 2001:559:85fa::/47
  • 2001:559:44::/48
  • 2001:559:f2::/48
  • 2001:559:10d::/48
  • 2001:559:10e::/48
  • 2001:559:15c::/48
  • 2001:559:1ef::/48
  • 2001:559:248::/48
  • 2001:559:254::/48
  • 2001:559:261::/48
  • 2001:559:270::/48
  • 2001:559:318::/48
  • 2001:559:330::/48
  • 2001:559:33d::/48
  • 2001:559:361::/48
  • 2001:559:365::/48
  • 2001:559:391::/48
  • 2001:559:3ce::/48
  • 2001:559:3d9::/48
  • 2001:559:3fe::/48
  • 2001:559:5a4::/48
  • 2001:559:5c8::/48
  • 2001:559:704::/48
  • 2001:559:7e0::/48
  • 2001:559:7e7::/48
  • 2001:559:8093::/48
  • 2001:559:809e::/48
  • 2001:559:80ac::/48
  • 2001:559:815e::/48
  • 2001:559:82d7::/48
  • 2001:559:82f7::/48
  • 2001:559:835e::/48
  • 2001:559:83e5::/48
  • 2001:559:8441::/48
  • 2001:559:847f::/48
  • 2001:559:84c0::/48
  • 2001:559:84db::/48
  • 2001:559:8567::/48
  • 2001:559:8577::/48
  • 2001:559:860e::/48
  • 2001:559:8709::/48
  • 2001:559:8730::/48
  • 2001:559:8752::/48
  • 2001:559:8774::/48
  • 2001:559:c0c8::/48
  • 2001:559:c0e6::/48
  • 2001:559:c150::/48
  • 2001:559:c1a3::/48
  • and 16 more