AS number details

AS21508

Comcast Cable Communications, LLC · comcast.com

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AS21508 – Comcast Cable Communications, LLC

Field	Value
Country	United States
Website	comcast.com
Hosted domains	1,944
Number of IPv4	73,728
Number of IPv6	85,833,733,192,638,671,404,138,496
ASN type	ISP
Registry	arin
Allocated	23 years ago on May 16, 2001
Updated	3 years ago on Jan 25, 2021

Netblock	Company	Num of IPs
141.104.0.0/16	Virginia Department of Education	65,536
157.240.147.0/24	Facebook, Inc.	256
157.240.148.0/24	Facebook, Inc.	256
173.242.174.0/24	County of Henrico	256
192.100.76.0/24	Westlab Consulting	256
198.90.112.0/22	WhiteSky Communications, LLC.	1,024
204.194.47.0/24	Va. Dept. of Rehabilitative Services	256
205.223.19.0/24	Virginia State Lottery Department	256
50.204.101.0/24	Comcast Cable Communications, LLC	256
50.205.217.0/24	Comcast Cable Communications, LLC	256
50.216.229.0/24	Comcast Cable Communications, LLC	256
50.217.1.0/24	Comcast Cable Communications, LLC	256
50.217.207.0/24	Comcast Cable Communications, LLC	256
50.218.47.0/24	Comcast Cable Communications, LLC	256
50.219.12.0/22	Comcast Cable Communications, LLC	1,024
50.219.222.0/24	Comcast Cable Communications, LLC	256
50.219.229.0/24	Comcast Cable Communications, LLC	256
50.219.238.0/24	Comcast Cable Communications, LLC	256
50.219.240.0/24	Comcast Cable Communications, LLC	256
50.220.111.0/24	Custom Computers	256
50.227.24.0/24	Comcast Cable Communications, LLC	256
50.228.113.0/24	Comcast Cable Communications, LLC	256
50.229.113.0/24	Comcast Cable Communications, LLC	256
50.229.114.0/24	Comcast Cable Communications, LLC	256
50.229.232.0/24	Comcast Cable Communications, LLC	256
50.229.233.0/24	Comcast Cable Communications, LLC	256
50.235.34.0/24	Comcast Cable Communications, LLC	256

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Netblock	Company
2001:559:220::/48	Comcast Cable Communications, LLC
2001:559:243::/48	Comcast Cable Communications, LLC
2001:559:280::/48	Comcast Cable Communications, LLC
2001:559:37d::/48	Comcast Cable Communications, LLC
2001:559:39d::/48	Comcast Cable Communications, LLC
2001:559:3ac::/48	Comcast Cable Communications, LLC
2001:559:3b9::/48	Comcast Cable Communications, LLC
2001:559:3c8::/48	Comcast Cable Communications, LLC
2001:559:40a::/48	Comcast Cable Communications, LLC
2001:559:49a::/48	Comcast Cable Communications, LLC
2001:559:49b::/48	Comcast Cable Communications, LLC
2001:559:4b6::/48	Comcast Cable Communications, LLC
2001:559:53c::/48	Comcast Cable Communications, LLC
2001:559:5c9::/48	Comcast Cable Communications, LLC
2001:559:5db::/48	Comcast Cable Communications, LLC
2001:559:720::/48	Comcast Cable Communications, LLC
2001:559:72b::/48	Comcast Cable Communications, LLC
2001:559:73c::/48	Comcast Cable Communications, LLC
2001:559:788::/48	Comcast Cable Communications, LLC
2001:559:78a::/48	Comcast Cable Communications, LLC
2001:559:79d::/48	Comcast Cable Communications, LLC
2001:559:79e::/48	Comcast Cable Communications, LLC
2001:559:7a7::/48	Comcast Cable Communications, LLC
2001:559:7db::/48	Comcast Cable Communications, LLC
2001:559:804c::/48	Comcast Cable Communications, LLC
2001:559:8060::/48	Comcast Cable Communications, LLC
2001:559:81bf::/48	Comcast Cable Communications, LLC
2001:559:81d7::/48	Comcast Cable Communications, LLC
2001:559:81d8::/48	Comcast Cable Communications, LLC
2001:559:8201::/48	Comcast Cable Communications, LLC
2001:559:82fd::/48	Comcast Cable Communications, LLC
2001:559:833e::/48	Comcast Cable Communications, LLC
2001:559:8416::/48	Comcast Cable Communications, LLC
2001:559:841c::/48	Comcast Cable Communications, LLC
2001:559:8445::/48	Comcast Cable Communications, LLC
2001:559:84a7::/48	Comcast Cable Communications, LLC
2001:559:8535::/48	Comcast Cable Communications, LLC
2001:559:85c1::/48	Comcast Cable Communications, LLC
2001:559:85ff::/48	Comcast Cable Communications, LLC
2001:559:8604::/48	Comcast Cable Communications, LLC
2001:559:871a::/48	Comcast Cable Communications, LLC
2001:559:875f::/48	Comcast Cable Communications, LLC
2001:559:8773::/48	Comcast Cable Communications, LLC
2001:559:87b2::/48	Comcast Cable Communications, LLC
2001:559:8a::/48	Comcast Cable Communications, LLC
2001:559:c0::/48	Comcast Cable Communications, LLC
2001:559:c071::/48	Comcast Cable Communications, LLC
2001:559:c0f6::/48	Comcast Cable Communications, LLC
2001:559:c0f7::/48	Comcast Cable Communications, LLC
2001:559:c0fa::/48	Comcast Cable Communications, LLC
2001:559:c10a::/48	Comcast Cable Communications, LLC
2001:559:c174::/48	Comcast Cable Communications, LLC
2001:559:c1a5::/48	Comcast Cable Communications, LLC
2001:559:c1ca::/48	Comcast Cable Communications, LLC
2001:559:c28f::/48	Comcast Cable Communications, LLC
2001:559:c290::/48	Comcast Cable Communications, LLC
2001:559:c2a7::/48	Comcast Cable Communications, LLC
2001:559:c344::/48	Comcast Cable Communications, LLC
2001:559:c3cf::/48	Comcast Cable Communications, LLC
2001:559:c3e9::/48	Comcast Cable Communications, LLC
2001:559:c458::/48	Comcast Cable Communications, LLC
2001:559:c45f::/48	Comcast Cable Communications, LLC
2001:559:c460::/48	Comcast Cable Communications, LLC
2001:559:c495::/48	Comcast Cable Communications, LLC
2001:559:c4c8::/48	Comcast Cable Communications, LLC
2001:559:c4c9::/48	Comcast Cable Communications, LLC
2001:559:c4db::/48	Comcast Cable Communications, LLC
2001:559:c4f6::/48	Comcast Cable Communications, LLC
2001:559:c515::/48	Comcast Cable Communications, LLC
2001:559:c538::/48	Comcast Cable Communications, LLC
2001:559:f7::/48	Comcast Cable Communications, LLC

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WHOIS Details

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ASHandle:       AS21508
OrgID:          AS21508
ASName:         AS21508
ASNumber:       AS21508
RegDate:        0000-00-00
Updated:        0000-00-00
TechHandle:     AA00-AAAA
Source:         AAAA

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Hosted Domains

There are 1,944 domain names hosted across 1,040 IP addresses on this ASN.

IP Address	Domain	Domains on this IP
192.100.76.118	ajpriest.com	6
192.100.76.117	extradevelopment.net	2
173.242.174.203	henricolibrary.org	1
141.104.145.20	milieuparkengeulenmaas.nl	1

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Peers

There are 50 peers for this ASN.

Peers	Name
AS11679	Stihl Inc.
AS11739	Digital Fortress, Inc.
AS13335	Cloudflare, Inc.
AS13952	New College Institute
AS14583	Virginia Information Technologies Agency (VITA)
AS15173	Newmarket Corporation
AS15297	EPLUS, Inc.
AS17381	Williams-Sonoma
AS19923	Shenandoah University
AS2134	Santander Global Technology, S.L.U
AS21863	intelivant consulting, llc
AS22274	Standard Motor Products, Inc
AS23209	Virginia Housing Development Authority
AS27326	VCU HEALTH SYSTEM AUTHORITY
AS27336	Sentara Healthcare
AS30299	THE MARTIN AGENCY
AS32540	HP Hood
AS33265	Lee Enterprises, Incorporated
AS33296	Piedmont Broadband Corporation
AS36244	Shenandoah Valley Electric Cooperative
AS36364	Mary Washington Hospital, Inc.
AS393415	LITTLER MENDELSON, P.C.
AS393591	Gamewood Technology Group, Inc.
AS393613	Virginia Credit Union, Inc.
AS393861	Inova Health System Foundation
AS394058	Telos Corporation
AS395441	EdgeConneX, INC
AS395505	iManage, LLC
AS395527	VSU_AS395527
AS395772	Augusta Health Care, Inc
AS396083	AREVA Inc.
AS396452	Loudoun Water
AS397039	WorldStrides
AS398475	Drilling Info Inc.
AS399099	petersburg city public schools
AS399232	Seton Home Study School
AS400114	Apogee Telecom Inc.
AS40288	CONGRESSIONAL FEDERAL CREDIT UNION
AS40323	Virginia Farm Bureau Mutual Insurance Company
AS40400	Middletown Data Center
AS40485	SANDY SPRING BANK
AS40641	MGW Telephone Company, Inc.
AS46643	Virginia College Savings Plan
AS46847	nexVortex
AS54219	Matthews International Corporation
AS54391	Crutchfield New Media LLC
AS54883	City of Richmond, Virginia
AS62971	County of Chesterfield
AS63468	Infinitt North America, Inc.
AS7922	Comcast Cable Communications, LLC

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Upstreams

There is 1 peer for this ASN.

upstreams	Name
AS7922	Comcast Cable Communications, LLC

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Downstreams

There are 48 downstreams for this ASN.

Downstreams	Name
AS11679	Stihl Inc.
AS11739	Digital Fortress, Inc.
AS13335	Cloudflare, Inc.
AS13952	New College Institute
AS14583	Virginia Information Technologies Agency (VITA)
AS15173	Newmarket Corporation
AS15297	EPLUS, Inc.
AS17381	Williams-Sonoma
AS19923	Shenandoah University
AS2134	Santander Global Technology, S.L.U
AS21863	intelivant consulting, llc
AS22274	Standard Motor Products, Inc
AS23209	Virginia Housing Development Authority
AS27326	VCU HEALTH SYSTEM AUTHORITY
AS27336	Sentara Healthcare
AS30299	THE MARTIN AGENCY
AS32540	HP Hood
AS33265	Lee Enterprises, Incorporated
AS33296	Piedmont Broadband Corporation
AS36244	Shenandoah Valley Electric Cooperative
AS36364	Mary Washington Hospital, Inc.
AS393591	Gamewood Technology Group, Inc.
AS393613	Virginia Credit Union, Inc.
AS393861	Inova Health System Foundation
AS394058	Telos Corporation
AS395441	EdgeConneX, INC
AS395505	iManage, LLC
AS395527	VSU_AS395527
AS395772	Augusta Health Care, Inc
AS396083	AREVA Inc.
AS396452	Loudoun Water
AS397039	WorldStrides
AS398475	Drilling Info Inc.
AS399099	petersburg city public schools
AS399232	Seton Home Study School
AS400114	Apogee Telecom Inc.
AS40288	CONGRESSIONAL FEDERAL CREDIT UNION
AS40323	Virginia Farm Bureau Mutual Insurance Company
AS40400	Middletown Data Center
AS40485	SANDY SPRING BANK
AS40641	MGW Telephone Company, Inc.
AS46643	Virginia College Savings Plan
AS46847	nexVortex
AS54219	Matthews International Corporation
AS54391	Crutchfield New Media LLC
AS54883	City of Richmond, Virginia
AS62971	County of Chesterfield
AS63468	Infinitt North America, Inc.

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What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS21508 at robtex.

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