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.

71,680 IP addresses
ASN21508
NameCOMCAST-21508
OrganizationComcast Cable Communications, LLC
CountryUnited States  
RegistryARIN
IPv4 addresses71,680
IPv6 /64 networks1.06 x 222
Prefixes87
Other ASN allocated to Comcast Cable Communications, LLC
ASN Name IP addresses
7922 COMCAST-7922 68,026,624
20214 COMCAST-20214 136,704
33659 CMCS 71,680
33491 COMCAST-33491 69,888
33651 CMCS 67,328
33667 CMCS 52,480
7015 COMCAST-7015 46,592
33490 COMCAST-33490 22,272
33652 CMCS 16,896
33657 CMCS 15,872
7016 CCCH-3 13,056
33287 COMCAST-33287 12,800
7725 COMCAST-7725 9,728
33668 CMCS 6,912
33650 COMCAST-33650 6,144
33662 CMCS 5,120
22258 COMCAST-22258 3,328
33660 CMCS 2,816
33489 COMCAST-33489 2,816
13367 COMCAST-13367 2,048
33661 CMCS 1,792
22909 COMCAST-22909 1,792
396021 COMCAST-MES 1,280
33666 CMCS 1,024
395980 COMCAST-MES 768
395974 COMCAST-MES 512
395976 COMCAST-MES 512
396017 COMCAST-MES 512
396415 COMCAST-MES 256
16748 COMCAST-TELECOMM-4 256
36732 COMCAST-36732 256
396019 COMCAST-MES 256
7853 COMCAST-TELECOMM-2 0
7757 COMCAST-7757 0
36377 PATRIOT-MEDIA-NJ 0
36733 DNEO-OSP7 0
53297 CIMEAST 0
393232 CMCS 0
33351 COMCAST-33351 0
33665 CMCS 0
23266 COMCAST-23266 0
23253 COMCAST-23253 0
33542 COMCAST-TELECOMM-3 0
6161 COMCAST-6161 0
33653 CMCS 0
14668 COMCAST-TELECOMM-6 0
33655 CMCS 0
33656 CMCS 0
13385 COMCAST-TELECOMM 0
33658 CMCS 0
33654 CMCS 0
11025 COMCAST-HOUSTON 0
33663 CMCS 0
33664 CMCS 0
36196 COMCAST-TELECOMM-5 0
IPv4 Prefixes for AS21508
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   Fort Lee 256
157.240.148.0/24 Comcast Cable Communications, LLC   Charlottesville 256
173.242.174.0/24 Comcast Cable Communications, LLC   Henrico 256
198.90.112.0/22 Comcast Cable Communications, LLC   Charlottesville 1,024
204.194.47.0/24 Comcast Cable Communications, LLC   Waynesboro 256
205.223.19.0/24 Comcast Cable Communications, LLC   Henrico 256
50.204.101.0/24 Comcast Cable Communications, LLC   Waynesboro 256
50.205.217.0/24 Comcast Cable Communications, LLC   Church Crossroads 256
50.216.229.0/24 Comcast Cable Communications   Charlottesville 256
50.217.1.0/24 Comcast Cable Communications, LLC   Charlottesville 256
50.217.207.0/24 Comcast Cable Communications, LLC   South Hill 256
50.218.47.0/24 Comcast Cable Communications, LLC   Shady Grove 256
50.219.12.0/22 Comcast Cable Communications, LLC   Winchester 1,024
50.227.24.0/24 Comcast Cable Communications, LLC   Waynesboro 256
50.228.113.0/24 Comcast Cable Communications, LLC   Palmyra 256
50.229.113.0/24 Comcast Cable Communications, LLC   Ashland 256
50.229.114.0/24 Comcast Cable Communications, LLC   Ashland 256
50.235.34.0/24 Comcast Cable Communications, LLC   Ashburn 256
IPv6 Prefixes for AS21508 - showing the first 20 of 68 networks
Network Location /64 Prefixes
2001:559:220::/48 Comcast Cable Communications, LLC   Waynesboro 216
2001:559:243::/48 Comcast Cable Communications, LLC   Sterling 216
2001:559:280::/48 Comcast Cable Communications, LLC   Ashburn 216
2001:559:37d::/48 Comcast Cable Communications, LLC   Lynchburg 216
2001:559:3ac::/48 Comcast Cable Communications, LLC   Henrico 216
2001:559:3b9::/48 Comcast Cable Communications, LLC   Winchester 216
2001:559:3c8::/48 Comcast Cable Communications, LLC   Winchester 216
2001:559:40a::/48 Comcast Cable Communications, LLC   Goochland 216
2001:559:49a::/48 Comcast Cable Communications, LLC   Spotsylvania Courthouse 216
2001:559:49b::/48 Comcast Cable Communications, LLC   Spotsylvania Courthouse 216
2001:559:53c::/48 Comcast Cable Communications, LLC   Richmond (South Richmond) 216
2001:559:5c9::/48 Comcast Cable Communications, LLC   Henrico 216
2001:559:5db::/48 Comcast Cable Communications, LLC   Henrico 216
2001:559:720::/48 Comcast Cable Communications, LLC   Petersburg 216
2001:559:72b::/48 Comcast Cable Communications, LLC   Waynesboro 216
2001:559:73c::/48 Comcast Cable Communications, LLC   Stafford 216
2001:559:788::/48 Comcast Cable Communications, LLC   Chesterfield Court House 216
2001:559:78a::/48 Comcast Cable Communications, LLC   Harrisonburg 216
2001:559:79d::/48 Comcast Cable Communications, LLC   Henrico 216
2001:559:79e::/48 Comcast Cable Communications, LLC   Leesburg 216