ASN AS33661 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS33661?

AS33661 is listed under Comcast Cable Communications, LLC.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS33661 Comcast Cable Communications, LLC

ASN Lookup Tool

Comcast Cable Communications, LLC comcast.com

US 23 Routes

AS Data

AS33661

AS33661 – Comcast Cable Communications, LLC

AS Number	33661
AS Name	CMCS
Organization	Comcast Cable Communications, LLC (cccs)
Country	US
Website	comcast.com
Number of IPv4 Routes	7
Number of IPv6 Routes	16
ASN type	ISP
Registry	ARIN
Date Allocated	2005-02-16

ASN Intelligence API for production workflows

Use ASN data for AS33661 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
2001:559:87d4::/48	AS33661	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	~1×10²⁴
2001:559:864f::/48	AS33661	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	~1×10²⁴
2001:559:c4b9::/48	AS33661	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	~1×10²⁴
50.226.0.0/24	AS33661	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	256
2001:559:85d6::/48	AS33661	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	~1×10²⁴
50.228.116.0/24	AS33661	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	256
50.227.97.0/24	AS33661	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	256
2001:559:c202::/48	AS33661	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	~1×10²⁴
2001:559:731::/48	AS33661	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	~1×10²⁴
2001:559:878c::/48	AS33661	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	~1×10²⁴

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       33661
ASName:         CMCS
ASHandle:       AS33661
RegDate:        2005-02-16
Updated:        2021-01-25
Ref:            https://rdap.arin.net/registry/autnum/33661



OrgName:        Comcast Cable Communications, LLC
OrgId:          CCCS
Address:        1800 Bishops Gate Blvd
City:           Mt Laurel
StateProv:      NJ
PostalCode:     08054
Country:        US
RegDate:        2001-09-18
Updated:        2020-11-18
Ref:            https://rdap.arin.net/registry/entity/CCCS


OrgTechHandle: IC161-ARIN
OrgTechName:   Comcast Cable Communications Inc
OrgTechPhone:  +1-856-792-2300 
OrgTechEmail:  CNIPEO-Ip-registration@cable.comcast.com
OrgTechRef:    https://rdap.arin.net/registry/entity/IC161-ARIN

OrgRoutingHandle: ROUTI25-ARIN
OrgRoutingName:   Routing
OrgRoutingPhone:  +1-856-792-2300 
OrgRoutingEmail:  routing@comcast.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/ROUTI25-ARIN

OrgAbuseHandle: NAPO-ARIN
OrgAbuseName:   Network Abuse and Policy Observance
OrgAbusePhone:  +1-888-565-4329 
OrgAbuseEmail:  abuse@comcast.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NAPO-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "33661",
    "as_handle" : "AS33661",
    "as_name" : "CMCS",
    "tech_contacts" : [ "IC161-ARIN", "ROUTI25-ARIN" ],
    "abuse_contacts" : [ "NAPO-ARIN" ],
    "date_created" : "2005-02-16",
    "date_updated" : "2021-01-25",
    "source" : "https://rdap.arin.net/registry/autnum/33661"
  } ],
  "organization" : {
    "handle" : "CCCS",
    "name" : "Comcast Cable Communications, LLC",
    "address" : [ "1800 Bishops Gate Blvd", "Mt Laurel", "NJ", "08054", "US" ],
    "street" : "Bishops Gate Blvd",
    "city" : "Mt Laurel",
    "state" : "NJ",
    "zip_code" : "08054",
    "country" : [ "US" ],
    "date_created" : "2001-09-18",
    "date_updated" : "2020-11-18",
    "source" : "https://rdap.arin.net/registry/entity/CCCS",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "IC161-ARIN",
    "name" : "Comcast Cable Communications Inc",
    "email" : [ "CNIPEO-Ip-registration@cable.comcast.com" ],
    "phone" : [ "+1-856-792-2300" ],
    "source" : "https://rdap.arin.net/registry/entity/IC161-ARIN"
  }, {
    "handle" : "ROUTI25-ARIN",
    "name" : "Routing",
    "email" : [ "routing@comcast.com" ],
    "phone" : [ "+1-856-792-2300" ],
    "source" : "https://rdap.arin.net/registry/entity/ROUTI25-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "NAPO-ARIN",
    "name" : "Network Abuse and Policy Observance",
    "email" : [ "abuse@comcast.net" ],
    "phone" : [ "+1-888-565-4329" ],
    "source" : "https://rdap.arin.net/registry/entity/NAPO-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS63264	Alternative Choice Wireless, LLC	US
AS46999	Crews Banking Corporation	US
AS26876	chico's fas inc	US
AS398641	Community Health Centers, Inc.	US
AS23542	Florida's Natural Growers, Inc.	US
AS63402	Universal Orlando	US
AS396291	NCH Healthcare System, Inc.	US
AS396910	Lee County Port Authority	US
AS46576	Loews Hotels at Universal Orlando	US
AS398743	The Nemours Foundation	US

Upstreams

AS Number	Description	Country
AS7922	Comcast Cable Communications, LLC	US

Downstreams

AS Number	Description	Country
AS63264	Alternative Choice Wireless, LLC	US
AS46999	Crews Banking Corporation	US
AS26876	chico's fas inc	US
AS398641	Community Health Centers, Inc.	US
AS23542	Florida's Natural Growers, Inc.	US
AS63402	Universal Orlando	US
AS396291	NCH Healthcare System, Inc.	US
AS396910	Lee County Port Authority	US
AS46576	Loews Hotels at Universal Orlando	US
AS398743	The Nemours Foundation	US