AS21508

Comcast Cable Communications, LLC

AS 21508 COMCAST-21508

Autonomous Systems are networks typically governed by large ISPs that participate in global Internet routing. Each network is assigned a unique identification number known as the AS number or ASN by the Internet Assigned Numbers Authority.

72,448 IP addresses
ASN21508
NameCOMCAST-21508
OrganizationComcast Cable Communications, LLC
CountryUnited States  
RegistryARIN
IPv4 addresses72,448
IPv6 /64 networks1.08 x 222
Prefixes92
Other ASN allocated to Comcast Cable Communications, LLC
ASN Name IP addresses
7922 COMCAST-7922 71,429,376
7015 COMCAST-7015 3,892,262
11025 COMCAST-HOUSTON 43,264
33662 CMCS 16,896
7725 COMCAST-7725 16,128
33650 COMCAST-33650 10,240
33489 COMCAST-33489 4,608
33666 CMCS 512
33654 CMCS 256
33655 CMCS 0
53297 CIMEAST 0
396415 COMCAST-GGIE 0
IPv4 Prefixes for AS21508 - showing the first 20 of 23 networks
Network Location Addresses
141.104.0.0/16 Comcast Cable Communications, LLC   Richmond (Downtown) 65,536
157.240.147.0/24 Comcast Cable Communications, LLC   Henrico 256
157.240.148.0/24 Comcast Cable Communications, LLC   Martinsville 256
173.242.174.0/24 Comcast Cable Communications, LLC   Staunton 256
192.100.76.0/24 Comcast Cable Communications, LLC   Richmond 256
198.90.112.0/22 Comcast Cable Communications, LLC   Ashburn 1,024
204.194.47.0/24 Va. Dept. of Rehabilitative Services   Sliders 256
205.223.19.0/24 Comcast Cable Communications, LLC   Henrico 256
50.204.101.0/24 Comcast Cable Communications, LLC   Ashburn 256
50.205.217.0/24 Comcast Cable Communications, LLC   Ashburn 256
50.216.229.0/24 Comcast Cable Communications   Ashburn 256
50.220.111.0/24 Comcast Cable Communications   Winchester 256
50.225.179.0/24 Comcast Cable Communications, LLC   Ashburn 256
50.227.24.0/24 Comcast Cable Communications, LLC   Ashburn 256
50.228.113.0/24 Comcast Cable Communications, LLC   Ashburn 256
50.229.113.0/24 Comcast Cable Communications, LLC   Ashburn 256
50.229.114.0/24 Comcast Cable Communications, LLC   Ashburn 256
50.229.95.0/24 Comcast Cable Communications, LLC   Sterling 256
50.232.58.0/23 Comcast Cable Communications   Louisa 512
50.234.62.0/23 Comcast Cable Communications, LLC   Ashburn 512
IPv6 Prefixes for AS21508 - showing the first 20 of 69 networks
Network Location /64 Prefixes
2001:559:19f::/48 Comcast Cable Communications, LLC   Mount Laurel Township 216
2001:559:21a::/48 Comcast Cable Communications, LLC   Mount Laurel Township 216
2001:559:243::/48 Comcast Cable Communications, LLC   Mount Laurel Township 216
2001:559:280::/48 Comcast Cable Communications, LLC   Mount Laurel Township 216
2001:559:34::/48 Comcast Cable Communications, LLC   Mount Laurel Township 216
2001:559:39d::/48 Comcast Cable Communications, LLC   Mount Laurel Township 216
2001:559:3ac::/48 Comcast Cable Communications, LLC   Henrico 216
2001:559:40a::/48 Comcast Cable Communications, LLC   Washington D.C. 216
2001:559:42b::/48 Comcast Cable Communications, LLC   Henrico 216
2001:559:43b::/48 Comcast Cable Communications, LLC   Ashburn 216
2001:559:49::/48 Comcast Cable Communications, LLC   Newark 216
2001:559:49a::/48 Comcast Cable Communications, LLC   Newark 216
2001:559:49b::/48 Comcast Cable Communications, LLC   Mount Laurel Township 216
2001:559:4b6::/48 Comcast Cable Communications, LLC   Mount Laurel Township 216
2001:559:53c::/48 Comcast Cable Communications, LLC   Washington D.C. 216
2001:559:543::/48 Comcast Cable Communications, LLC   Mount Laurel Township 216
2001:559:54c::/48 Comcast Cable Communications, LLC   Mount Laurel Township 216
2001:559:54d::/48 Comcast Cable Communications, LLC   Ashburn 216
2001:559:5bb::/48 Comcast Cable Communications, LLC   Ashburn 216
2001:559:5da::/48 Comcast Cable Communications, LLC   Newark 216