// Comcast - Richmond // Comcast - Richmond

Description: Comcast Cable Communications, Inc. 1800 Bishops Gate Blvd Mt Laurel, NJ 08054 US

Registry: LEVEL3

Direct Membership

Macros that directly list AS21508 as a member:

AS-COMCAST-IBONE(132 members)

Expanded Membership

All macros containing AS21508 (directly or via nested macros): 12

Show 12 macros

AS-COMCAST-IBONE(19,609 ASNs)
AS-GLOBEINTERNET(84,477 ASNs)
AS-GLOBEINTERNET-CLIENTS(84,477 ASNs)
AS-DECIX(96,509 ASNs)
AS-NFON-DECIX-PEERS-V4(96,509 ASNs)
AS-NFON-DECIX-PEERS-V6(96,509 ASNs)
AS6695:AS-DECIX-FRA(96,509 ASNs)
AS-ST1-IXPS(96,670 ASNs)
AS-DECIX-V6(100,277 ASNs)
AS6695:AS-DECIX-FRA-V6(100,277 ASNs)
AS-CLOUD-IX-PRO(100,911 ASNs)
AS-MERKEL-PEERS(100,925 ASNs)

Upstream AS Paths

50 unique paths, avg length 2.8

AS Looking Glass

Upstream paths (matching graph above)

AS4181 → AS1299 → AS7922 → AS21508
AS8888 → AS1299 → AS7922 → AS21508
AS23367 → AS1299 → AS7922 → AS21508
AS33185 → AS1299 → AS7922 → AS21508
AS52320 → AS1299 → AS7922 → AS21508
AS140627 → AS1299 → AS7922 → AS21508
AS955 → AS6939 → AS7922 → AS21508
AS3214 → AS6939 → AS7922 → AS21508
AS8888 → AS6939 → AS7922 → AS21508
AS19653 → AS6939 → AS7922 → AS21508
AS22296 → AS6939 → AS7922 → AS21508
AS33185 → AS6939 → AS7922 → AS21508
AS37721 → AS6939 → AS7922 → AS21508
AS38136 → AS6939 → AS7922 → AS21508
AS60144 → AS6939 → AS7922 → AS21508
AS135895 → AS6939 → AS7922 → AS21508
AS150000 → AS6939 → AS7922 → AS21508
AS199518 → AS6939 → AS7922 → AS21508
AS208753 → AS6939 → AS7922 → AS21508
AS398465 → AS6939 → AS7922 → AS21508

All 50 Upstream Paths

Complete list of all observed paths

AS136557 → AS174 → AS7922 → AS21508
AS199524 → AS174 → AS7922 → AS21508
AS852 → AS7922 → AS21508
AS1299 → AS7922 → AS21508
AS4181 → AS1299 → AS7922 → AS21508
AS8888 → AS1299 → AS7922 → AS21508
AS23367 → AS1299 → AS7922 → AS21508
AS33185 → AS1299 → AS7922 → AS21508
AS52320 → AS1299 → AS7922 → AS21508
AS140627 → AS1299 → AS7922 → AS21508
AS2516 → AS7922 → AS21508
AS2914 → AS7922 → AS21508
AS2497 → AS2914 → AS7922 → AS21508
AS2500 → AS2914 → AS7922 → AS21508
AS3257 → AS7922 → AS21508
AS3320 → AS7922 → AS21508
AS7594 → AS3356 → AS7922 → AS21508
AS49544 → AS3356 → AS7922 → AS21508
AS199524 → AS3356 → AS7922 → AS21508
AS262462 → AS3356 → AS7922 → AS21508
AS3491 → AS7922 → AS21508
AS1221 → AS4637 → AS7922 → AS21508
AS37721 → AS5511 → AS7922 → AS21508
AS16552 → AS6453 → AS7922 → AS21508
AS32590 → AS6762 → AS7922 → AS21508
AS199524 → AS6762 → AS7922 → AS21508
AS6830 → AS7922 → AS21508
AS6939 → AS7922 → AS21508
AS955 → AS6939 → AS7922 → AS21508
AS3214 → AS6939 → AS7922 → AS21508
AS8888 → AS6939 → AS7922 → AS21508
AS19653 → AS6939 → AS7922 → AS21508
AS22296 → AS6939 → AS7922 → AS21508
AS33185 → AS6939 → AS7922 → AS21508
AS37721 → AS6939 → AS7922 → AS21508
AS38136 → AS6939 → AS7922 → AS21508
AS60144 → AS6939 → AS7922 → AS21508
AS135895 → AS6939 → AS7922 → AS21508
AS150000 → AS6939 → AS7922 → AS21508
AS199518 → AS6939 → AS7922 → AS21508
AS208753 → AS6939 → AS7922 → AS21508
AS398465 → AS6939 → AS7922 → AS21508
AS142271 → AS9304 → AS7922 → AS21508
AS32590 → AS12956 → AS7922 → AS21508
AS199524 → AS12956 → AS7922 → AS21508
AS262462 → AS12956 → AS7922 → AS21508
AS2734 → AS27552 → AS7922 → AS21508
AS36236 → AS7922 → AS21508
AS49544 → AS7922 → AS21508
AS398465 → AS7922 → AS21508

AS21508 IPv4 Address Subnets (18)

141.104.0.0/16	🇺🇸 US	Comcast Cable Communications, Inc. 1800 Bishops Ga…	COMCAST-IBONE
198.90.112.0/22	🇺🇸 US	Comcast Cable Communications, Inc. 1800 Bishops Ga…	COMCAST-IBONE
50.219.12.0/22	🇺🇸 US		COMCAST-21508
157.240.147.0/24	🇺🇸 US	fzrd1	COMCAST-21508
157.240.148.0/24	🇺🇸 US	fzrd1	COMCAST-21508
173.242.174.0/24	🇺🇸 US		COMCAST-21508
204.194.47.0/24	🇺🇸 US	Comcast cable Communications, Inc. 1800 Bishops Ga…	COMCAST-IBONE
205.223.19.0/24	🇺🇸 US	Comcast cable Communications, Inc. 1800 Bishops Ga…	COMCAST-IBONE
50.204.101.0/24	🇺🇸 US		COMCAST-21508
50.205.217.0/24	🇺🇸 US		COMCAST-21508

AS21508 IPv6 Address Subnets (74)

2001:558:180::/44	🇺🇸 US	COMCAST-21508
2001:558:230::/44	🇺🇸 US	COMCAST-21508
2001:558:701a::/48	🇺🇸 US	COMCAST-21508
2001:558:fe30::/48	🇺🇸 US	COMCAST-21508
2001:559:220::/48	🇺🇸 US	COMCAST-21508
2001:559:243::/48	🇺🇸 US	COMCAST-21508
2001:559:280::/48	🇺🇸 US	COMCAST-21508
2001:559:37d::/48	🇺🇸 US	COMCAST-21508
2001:559:3ac::/48	🇺🇸 US	COMCAST-21508
2001:559:3b9::/48	🇺🇸 US	COMCAST-21508