AS21508 COMCAST-21508 Summary

AS number details

AS21508

COMCAST-21508

Summary

AS Number

AS21508

AS Name

COMCAST-21508

Country

United States

Website

IPv4 Prefixes

IPv6 Prefixes

IPv4 Peers

IPv6 Peers

IPv4 Upstreams

IPv6 Upstreams

Regional Registry

ARIN

Allocated Date

16th May 2001

Allocated Status

Assigned

Announced Prefix	Description	Country	Parent Prefix	RIR
157.240.147.0/24	Facebook, Inc.	United States	157.240.0.0/16	ARIN
157.240.148.0/24	Facebook, Inc.	United States	157.240.0.0/16	ARIN
173.242.174.0/24	County of Henrico	United States	173.242.160.0/20	ARIN
192.100.76.0/24	Westlab Consulting	United States		ARIN
198.90.112.0/22	WhiteSky Communications, LLC.	United States	198.90.96.0/19	ARIN
204.194.47.0/24	Va. Dept. of Rehabilitative Services	United States	204.194.40.0/21	ARIN
205.223.19.0/24	Virginia State Lottery Department	United States	205.223.16.0/20	ARIN
50.204.101.0/24	Comcast Cable Communications, LLC	United States	50.128.0.0/9	ARIN
50.205.217.0/24	Comcast Cable Communications, LLC	United States	50.128.0.0/9	ARIN
50.216.229.0/24	Comcast Cable Communications, LLC	United States	50.128.0.0/9	ARIN
50.217.1.0/24	Comcast Cable Communications, LLC	United States	50.128.0.0/9	ARIN
50.217.207.0/24	Comcast Cable Communications, LLC	United States	50.128.0.0/9	ARIN
50.218.47.0/24	Comcast Cable Communications, LLC	United States	50.128.0.0/9	ARIN
50.219.12.0/22	Comcast Cable Communications, LLC	United States	50.128.0.0/9	ARIN
50.219.193.0/24	Comcast Cable Communications, LLC	United States	50.128.0.0/9	ARIN
50.219.222.0/24	Comcast Cable Communications, LLC	United States	50.128.0.0/9	ARIN
50.219.229.0/24	Comcast Cable Communications, LLC	United States	50.128.0.0/9	ARIN
50.219.238.0/24	Comcast Cable Communications, LLC	United States	50.128.0.0/9	ARIN
50.219.240.0/24	Comcast Cable Communications, LLC	United States	50.128.0.0/9	ARIN
50.220.111.0/24	Custom Computers	United States	50.128.0.0/9	ARIN
2001:559:243::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:280::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:37d::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:39d::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:3ac::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:3b9::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:3c8::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:40a::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:49a::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:49b::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:4b6::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:53c::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:5c9::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:5da::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:5db::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:720::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:72b::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:73c::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:788::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN
2001:559:78a::/48	Comcast Cable Communications, LLC	United States	2001:558::/29	ARIN

ASN	Description	Country	IPv4
AS13335	Cloudflare, Inc.	United States	true
AS13952	New College Institute	United States	false
AS14538	Harrisonburg Electric Commission	United States	false
AS14583	Virginia Information Technologies Agency (VITA)	United States	false
AS15173	Newmarket Corporation	United States	false
AS15297	EPLUS, Inc.	United States	false
AS17381	Williams-Sonoma	United States	false
AS19923	Shenandoah University	United States	false
AS2134	GS Virtual Network Produban	Spain	false
AS21863	intelivant consulting, llc	United States	false
AS22274	Standard Motor Products, Inc	United States	false
AS23209	Virginia Housing Development Authority	United States	false
AS27326	VCU HEALTH SYSTEM AUTHORITY	United States	false
AS27336	Sentara Healthcare	United States	false
AS30299	THE MARTIN AGENCY	United States	false
AS32540	HP Hood	United States	false
AS33265	Lee Enterprises, Incorporated	United States	false
AS33296	Piedmont Broadband, Inc	United States	false
AS36244	Shenandoah Valley Electric Cooperative	United States	false
AS36364	Mary Washington Hospital, Inc.	United States	false

ASN	Description	Country	IPv6
AS40641	MGW Telephone Company, Inc.	United States	true
AS54391	Crutchfield New Media LLC	United States	true
AS7922	Comcast Cable Communications, LLC	United States	true

Announced Prefix	Description	Country	IPv4
AS13335	Cloudflare, Inc.	United States	true
AS13952	New College Institute	United States	false
AS14538	Harrisonburg Electric Commission	United States	false
AS14583	Virginia Information Technologies Agency (VITA)	United States	false
AS15173	Newmarket Corporation	United States	false
AS15297	EPLUS, Inc.	United States	false
AS17381	Williams-Sonoma	United States	false
AS19923	Shenandoah University	United States	false
AS2134	GS Virtual Network Produban	Spain	false
AS21863	intelivant consulting, llc	United States	false
AS22274	Standard Motor Products, Inc	United States	false
AS23209	Virginia Housing Development Authority	United States	false
AS27326	VCU HEALTH SYSTEM AUTHORITY	United States	false
AS27336	Sentara Healthcare	United States	false
AS30299	THE MARTIN AGENCY	United States	false
AS32540	HP Hood	United States	false
AS33265	Lee Enterprises, Incorporated	United States	false
AS33296	Piedmont Broadband, Inc	United States	false
AS36244	Shenandoah Valley Electric Cooperative	United States	false
AS36364	Mary Washington Hospital, Inc.	United States	false

Announced Prefix	Description	Country	IPv6
AS40641	MGW Telephone Company, Inc.	United States	true
AS54391	Crutchfield New Media LLC	United States	true

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What is an ASN?

An Autonomous System (AS) is a collection of connected networks that operate under a common administrative domain and share routing policies. Each AS is identified by a unique Autonomous System Number (ASN), which is used to exchange routing information with other ASs. AS can control how traffic flows through networks and then filter out unwanted traffic.

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