ASN AS33660 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS33660?

AS33660 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.

AS33660 Comcast Cable Communications, LLC

ASN Lookup Tool

Comcast Cable Communications, LLC comcast.com

US 65 Routes

AS Data

AS33660

AS33660 – Comcast Cable Communications, LLC

AS Number	33660
AS Name	CMCS
Organization	Comcast Cable Communications, LLC(cccs)
Country	US
Website	comcast.com
Number of IPv4 Routes	10
Number of IPv6 Routes	55
ASN type	ISP
Registry	ARIN
Date Allocated	2005-02-16

ASN Intelligence API for production workflows

Use ASN data for AS33660 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:c0ef::/48	AS33660	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	~1×10²⁴
50.204.89.0/24	AS33660	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	256
2001:559:57f::/48	AS33660	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	~1×10²⁴
2001:559:fa::/48	AS33660	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	~1×10²⁴
2001:559:c493::/48	AS33660	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	~1×10²⁴
2001:559:58c::/48	AS33660	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	~1×10²⁴
2001:559:5d8::/48	AS33660	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	~1×10²⁴
129.134.166.0/24	AS33660	Comcast Cable Communications, LLC	Facebook, Inc.	256
2001:559:c3f5::/48	AS33660	Comcast Cable Communications, LLC	Comcast Cable Communications, LLC	~1×10²⁴
2001:559:c54c::/48	AS33660	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:       33660
ASName:         CMCS
ASHandle:       AS33660
RegDate:        2005-02-16
Updated:        2021-01-25    
Ref:            https://rdap.arin.net/registry/autnum/33660



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


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

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


#
# 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

Peers

AS Number	Description	Country
AS26740	LifeWave, Inc.	US
AS3549	Level 3 Communications, Inc. (GBLX)	US
AS397157	RESERVED	ZZ
AS33741	Dennis Group	US
AS395994	VECC	US
AS11688	Lightstream Communications, Inc.	US
AS55251	TaxHawk, Inc.	US
AS27625	Ubiquiti Networks, Inc.	US
AS27480	Management & Training Corporation	US
AS400988	Salt Lake County	US

Upstreams

AS Number	Description	Country
AS3356	Level 3 Parent, LLC	US
AS7922	Comcast Cable Communications, LLC	US

Downstreams

AS Number	Description	Country
AS26740	LifeWave, Inc.	US
AS33741	Dennis Group	US
AS395994	VECC	US
AS11688	Lightstream Communications, Inc.	US
AS55251	TaxHawk, Inc.	US
AS27625	Ubiquiti Networks, Inc.	US
AS27480	Management & Training Corporation	US
AS400988	Salt Lake County	US
AS393557	Park City Municipal Corporation	US
AS20229	Merrick Bank	US

Contacts

Email Contacts

routing@comcast.com CNIPEO-Ip-registration@cable.comcast.com

Abuse Contacts

abuse@comcast.net

Legacy Routes

2001:559:819d::/48