AS21508

Summary

Country	United States
Organization	Comcast Cable Communications, LLC
Domain	comcast.net
Number of IPv4	73,472
Number of IPv6	8.4625× 1025
AS Type	ISP
Registry	ARIN
Allocated	May 16, 2001 (about 23 years ago)
Updated	January 25, 2021 (about 3 years ago)

IP Ranges

AS21508 announces 26 IPv4 ranges and 70 IPv6 ranges.

That's a total of 73,472 IPv4 addresses and 8.4625× 10²⁵ IPv6 addresses.

Prefix	Organization	Size	Registry	Status
50.204.101.0/24	Comcast Cable Communications, LLC	256	ARIN	ALLOCATION
50.205.217.0/24	Comcast Cable Communications, LLC	256	ARIN	ALLOCATION
50.216.229.0/24	Comcast Cable Communications, LLC	256	ARIN	ALLOCATION
50.217.1.0/24	Comcast Cable Communications, LLC	256	ARIN	ALLOCATION
50.217.207.0/24	Comcast Cable Communications, LLC	256	ARIN	ALLOCATION
50.219.12.0/22	Comcast Cable Communications, LLC	1,024	ARIN	ALLOCATION
50.219.222.0/24	Comcast Cable Communications, LLC	256	ARIN	REALLOCATION
50.219.229.0/24	Comcast Cable Communications, LLC	256	ARIN	REALLOCATION
50.219.238.0/24	Comcast Cable Communications, LLC	256	ARIN	REALLOCATION
50.219.240.0/24	Comcast Cable Communications, LLC	256	ARIN	REALLOCATION
50.220.111.0/24	Custom Computers	256	ARIN	REASSIGNMENT
50.227.24.0/24	Comcast Cable Communications, LLC	256	ARIN	ALLOCATION
50.228.113.0/24	Comcast Cable Communications, LLC	256	ARIN	ALLOCATION
50.229.113.0/24	Comcast Cable Communications, LLC	256	ARIN	ALLOCATION
50.229.114.0/24	Comcast Cable Communications, LLC	256	ARIN	ALLOCATION
50.229.232.0/24	Comcast Cable Communications, LLC	256	ARIN	ALLOCATION
50.229.233.0/24	Comcast Cable Communications, LLC	256	ARIN	ALLOCATION
50.235.34.0/24	Comcast Cable Communications, LLC	256	ARIN	ALLOCATION
141.104.0.0/16	Virginia Department of Education	65,536	ARIN	ALLOCATION
157.240.147.0/24	Facebook, Inc.	256	ARIN	ALLOCATION
157.240.148.0/24	Facebook, Inc.	256	ARIN	ALLOCATION
173.242.174.0/24	County of Henrico	256	ARIN	ALLOCATION
192.100.76.0/24	Westlab Consulting	256	ARIN	ALLOCATION
198.90.112.0/22	Whitesky Communications, Llc.	1,024	ARIN	ALLOCATION
204.194.47.0/24	Va. Dept. of Rehabilitative Services	256	ARIN	ALLOCATION
205.223.19.0/24	Virginia State Lottery Department	256	ARIN	ALLOCATION

Prefix	Organization	Size	Registry	Status
2001:559:8a::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c0::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:f7::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:220::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:243::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:280::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:37d::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:39d::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:3ac::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:3b9::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:3c8::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:40a::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:49a::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:49b::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:4b6::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:53c::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:5c9::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:5db::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:720::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:72b::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:73c::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:788::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:78a::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:79d::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:79e::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:7a7::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:7db::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:804c::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:8060::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:81bf::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:81d7::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:81d8::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:8201::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:82fd::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:833e::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:8416::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:841c::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:8445::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:84a7::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:8535::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:85c1::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:85ff::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:8604::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:871a::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:875f::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:8773::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:87b2::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c071::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c0f6::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c0f7::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c0fa::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c10a::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c174::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c1a5::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c1ca::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c28f::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c290::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c2a7::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c344::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c3e9::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c458::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c45f::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c460::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c495::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c4c8::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c4c9::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c4db::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c4f6::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c515::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION
2001:559:c538::/48	Comcast Cable Communications, LLC	1.2089× 1024	ARIN	ALLOCATION

Peers

There is no peer for AS21508.

Upstreams

There are 1 upstream for AS21508:

Downstreams

There are 48 downstreams for AS21508: