heade.rs
JSON

Network

AS33657

United States

Comcast Cable Communications, LLC

Comcast Cable Communications announces 185 IPv4 prefixes (1.6M addresses) and 253 IPv6 prefixes from the United States. 97% of them are covered by valid RPKI records.

Prefixes

185 · 253

IPv4 · IPv6

Address space

1.6M

IPv4 addresses · 8.5M IPv6 /48s

RPKI

97% valid

7 invalid · 5 without a record

Peering

Restrictive

0 exchanges · 1 facility

Where it is

1 facility with known locations

Details

Network

Name
Comcast Cable Communications, LLC
Type
Cable/DSL/ISP
Country
United StatesUnited States
UsersCloudflare Radar's estimate of people who reach the internet through this network.
About 925

Connectivity

Cloudflare Radar
UpstreamsNetworks this one buys transit from.
Lumen AS3356Comcast
PeersNetworks it exchanges traffic with directly, without paying either way.
2
CustomersNetworks that buy transit from it.
131

Routing security

ASPAAn RPKI record listing the only networks allowed to be its upstream providers, so routers can reject leaked or forged paths.
Not published
RPKI coverageShare of its announcements that a signed record (ROA) authorizes.
426 of 438 valid
IncidentsPossible BGP hijacks (high-confidence detections) and route leaks involving this network in the last 30 days, from Cloudflare Radar.
None in 30 days

AS33657 on Cloudflare Radar →PeeringDB →

Largest prefixes

438 announcements in all

IPv4

185
  1. 68.33.0.0/16RPKI valid
  2. 69.140.0.0/16RPKI valid
  3. 69.143.0.0/16RPKI valid
  4. 69.250.0.0/16RPKI valid
  5. 69.251.0.0/16RPKI valid
  6. 69.255.0.0/16RPKI valid
  7. 76.100.0.0/16RPKI valid
  8. 76.151.0.0/16RPKI valid
  9. 174.172.0.0/16RPKI valid
  10. 24.126.0.0/17RPKI valid
  11. 50.186.128.0/17RPKI valid
  12. 69.243.0.0/17RPKI valid
  13. 71.200.0.0/17RPKI valid
  14. 76.21.128.0/17RPKI valid
  15. 76.106.0.0/17RPKI valid
  16. 184.112.0.0/17RPKI valid
  17. 50.190.192.0/18RPKI valid
  18. 50.211.128.0/18RPKI valid
  19. 50.213.192.0/18RPKI valid
  20. 50.242.192.0/18RPKI valid
  21. 50.246.64.0/18RPKI valid
  22. 50.249.0.0/18RPKI valid
  23. 50.253.0.0/18RPKI valid
  24. 69.138.192.0/18RPKI valid