Summary

Country
US United States
Organization Comcast Cable Communications, LLC
Domain comcast.net
Number of IPv4 72,448
Number of IPv6 8.2207× 1025
AS Type Business
Registry ARIN
Allocated May 16, 2001 (about 24 years ago)
Updated January 25, 2021 (about 4 years ago)

IP Ranges

AS21508 announces 22 IPv4 ranges and 68 IPv6 ranges.

That's a total of 72,448 IPv4 addresses and 8.2207× 1025 IPv6 addresses.

Prefix Organization Size Registry Status
50.204.101.0/24
US Comcast Cable Communications, LLC
256 ARIN ALLOCATION
50.205.217.0/24
US Comcast Cable Communications, LLC
256 ARIN ALLOCATION
50.216.229.0/24
US Comcast Cable Communications, LLC
256 ARIN ALLOCATION
50.217.1.0/24
US Comcast Cable Communications, LLC
256 ARIN ALLOCATION
50.217.207.0/24
US Comcast Cable Communications, LLC
256 ARIN ALLOCATION
50.218.47.0/24
US Comcast Cable Communications, LLC
256 ARIN ALLOCATION
50.219.12.0/22
US Comcast Cable Communications, LLC
1,024 ARIN ALLOCATION
50.220.111.0/24
US Custom Computers
256 ARIN REASSIGNMENT
50.227.24.0/24
US Comcast Cable Communications, LLC
256 ARIN ALLOCATION
50.228.113.0/24
US Comcast Cable Communications, LLC
256 ARIN ALLOCATION
50.229.113.0/24
US Comcast Cable Communications, LLC
256 ARIN ALLOCATION
50.229.114.0/24
US Comcast Cable Communications, LLC
256 ARIN ALLOCATION
50.229.232.0/24
US Comcast Cable Communications, LLC
256 ARIN ALLOCATION
50.229.233.0/24
US Comcast Cable Communications, LLC
256 ARIN ALLOCATION
50.235.34.0/24
US Comcast Cable Communications, LLC
256 ARIN ALLOCATION
141.104.0.0/16
US Virginia Department of Education
65,536 ARIN ALLOCATION
157.240.147.0/24
US Facebook, Inc.
256 ARIN ALLOCATION
157.240.148.0/24
US Facebook, Inc.
256 ARIN ALLOCATION
173.242.174.0/24
US County of Henrico
256 ARIN ALLOCATION
198.90.112.0/22
US Whitesky Communications, Llc.
1,024 ARIN ALLOCATION
204.194.47.0/24
US Va. Dept. of Rehabilitative Services
256 ARIN ALLOCATION
205.223.19.0/24
US Virginia State Lottery Department
256 ARIN ALLOCATION
Prefix Organization Size Registry Status
2001:559:8a::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c0::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:f7::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:220::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:243::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:280::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:37d::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:3ac::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:3b9::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:3c8::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:40a::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:49a::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:49b::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:4b6::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:53c::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:5c9::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:5db::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:720::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:72b::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:73c::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:788::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:78a::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:79d::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:79e::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:7a7::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:7db::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:804c::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:81bf::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:81d7::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:81d8::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:8201::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:82fd::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:833e::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:8416::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:841c::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:8445::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:84a7::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:8535::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:85c1::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:85ff::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:8604::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:871a::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:875f::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:8773::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:87b2::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c071::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c0f6::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c0f7::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c0fa::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c10a::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c174::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c1a5::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c1ca::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c28f::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c290::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c2a7::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c344::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c3e9::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c458::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c45f::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c460::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c495::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c4c8::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c4c9::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c4db::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c4f6::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c515::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION
2001:559:c538::/48
US Comcast Cable Communications, LLC
1.2089× 1024 ARIN ALLOCATION

Peers

AS21508 does not have any direct peering agreements. Instead, its global connectivity is achieved through transit providers. While this setup ensures comprehensive reach, future peering could reduce latency and optimize route efficiency.

Upstreams

AS21508 connects to the global Internet via at least 1 upstream provider. In this setup, AS21508 acts as a customer, subscribing to these transit services to obtain full BGP routing information and ensure reliable, redundant access to external networks.

Downstreams

AS21508 serves as a transit provider the following ASes, delivering the BGP routes needed for global connectivity. This downstream relationship underscores AS21508's role in extending Internet access beyond its own infrastructure.

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