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.

73,472 IP addresses
ASN21508
NameCOMCAST-21508
OrganizationComcast Cable Communications, LLC
CountryUnited States  
RegistryARIN
IPv4 addresses73,472
IPv6 /64 networks1.23 x 222
Prefixes104
Other ASN allocated to Comcast Cable Communications, LLC
ASN Name IP addresses
7922 COMCAST-7922 72,469,248
7015 COMCAST-7015 3,841,540
20214 COMCAST-20214 142,080
33651 CMCS 116,480
33657 CMCS 108,032
33491 COMCAST-33491 83,968
33667 CMCS 80,896
33660 CMCS 75,008
11025 COMCAST-HOUSTON 43,264
33659 CMCS 20,992
33668 CMCS 18,688
7016 CCCH-3 17,920
33287 COMCAST-33287 17,920
7725 COMCAST-7725 16,128
33650 COMCAST-33650 15,616
33652 CMCS 13,056
33490 COMCAST-33490 11,008
36733 DNEO-OSP7 8,192
22909 COMCAST-22909 6,656
22258 COMCAST-22258 6,400
33661 CMCS 5,120
33489 COMCAST-33489 4,608
13367 COMCAST-13367 4,096
396021 COMCAST-D 1,280
33666 CMCS 512
33665 CMCS 512
33654 CMCS 256
396017 COMCAST-D 256
395980 COMCAST-D 256
395976 COMCAST-D 256
396019 COMCAST-D 256
395974 COMCAST-D 256
53297 CIMEAST 0
36732 COMCAST-36732 0
33656 CMCS 0
33655 CMCS 0
33653 CMCS 0
13385 COMCAST-TELECOMM 0
396415 COMCAST-GGIE 0
IPv4 Prefixes for AS21508 - showing the first 20 of 25 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   Sanburne Park 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   Sanburne Park 256
50.204.101.0/24 Comcast Cable Communications, LLC   Ashburn 256
50.205.217.0/24 Comcast Cable Communications, LLC   Church Crossroads 256
50.207.86.0/24 Comcast Cable Communications, LLC   Ashburn 256
50.216.229.0/24 Comcast Cable Communications   Ashburn 256
50.217.1.0/24 Comcast Cable Communications, LLC   Ashburn 256
50.218.47.0/24 Comcast Cable Communications, LLC   Sterling 256
50.219.12.0/22 Comcast Cable Communications, LLC   Winchester 1,024
50.220.111.0/24 Comcast Cable Communications   Martinsburg 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
IPv6 Prefixes for AS21508 - showing the first 20 of 79 networks
Network Location /64 Prefixes
2001:559:19f::/48 Comcast Cable Communications, LLC   Aurora 216
2001:559:220::/48 Comcast Cable Communications, LLC   Ashburn 216
2001:559:243::/48 Comcast Cable Communications, LLC   Newark 216
2001:559:280::/48 Comcast Cable Communications, LLC   Oklahoma City (Central Oklahoma City) 216
2001:559:39d::/48 Comcast Cable Communications, LLC   Church Crossroads 216
2001:559:3ac::/48 Comcast Cable Communications, LLC   Sanburne Park 216
2001:559:3b9::/48 Comcast Cable Communications, LLC   Winchester 216
2001:559:40a::/48 Comcast Cable Communications, LLC   Ashburn 216
2001:559:42b::/48 Comcast Cable Communications, LLC   Sanburne Park 216
2001:559:43b::/48 Comcast Cable Communications, LLC   Ashburn 216
2001:559:49a::/48 Comcast Cable Communications, LLC   Ashburn 216
2001:559:49b::/48 Comcast Cable Communications, LLC   Ashburn 216
2001:559:4b6::/48 Comcast Cable Communications, LLC   New York 216
2001:559:53c::/48 Comcast Cable Communications, LLC   Ashburn 216
2001:559:543::/48 Comcast Cable Communications, LLC   Ashburn 216
2001:559:54c::/48 Comcast Cable Communications, LLC   Ashburn 216
2001:559:54d::/48 Comcast Cable Communications, LLC   Warrenton 216
2001:559:5bb::/48 Comcast Cable Communications, LLC   New York 216
2001:559:5da::/48 Comcast Cable Communications, LLC   Warrenton 216
2001:559:5db::/48 Comcast Cable Communications, LLC   Sanburne Park 216