ASN AS19720 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS19720?

AS19720 is listed under Cablevision Systems Corp..

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.

AS19720 Cablevision Systems Corp.

ASN Lookup Tool

Cablevision Systems Corp. cv.net

US 9 Routes

AS Data

AS19720

AS19720 – Cablevision Systems Corp.

AS Number	19720
AS Name	CABLEVISION-CORP
Organization	Cablevision Systems Corp.(cvnt)
Country	US
Website	cv.net
Number of IPv4 Routes	9
Number of IPv6 Routes	0
ASN type	ISP
Registry	ARIN
Date Allocated	2001-02-07

ASN Intelligence API for production workflows

Use ASN data for AS19720 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
167.206.122.0/24	AS19720	Cablevision Systems Corp.	Cablevision Executive Offices	256
167.206.123.0/24	AS19720	Cablevision Systems Corp.	Cablevision Executive Offices	256
167.206.120.0/24	AS19720	Cablevision Systems Corp.	Cablevision Executive Offices	256
216.2.195.0/24	AS19720	Cablevision Systems Corp.	Cablevision Systems Corp.	256
65.51.29.0/24	AS19720	Cablevision Systems Corp.	Cablevision Infrastructure	256
216.2.194.0/24	AS19720	Cablevision Systems Corp.	Cablevision Systems Corp.	256
167.206.119.0/24	AS19720	Cablevision Systems Corp.	Cablevision	256
216.2.193.0/24	AS19720	Cablevision Systems Corp.	Cablevision Systems Corp.	256
65.51.31.0/24	AS19720	Cablevision Systems Corp.	Cablevision Infrastructure	256

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:       19720
ASName:         CABLEVISION-CORP
ASHandle:       AS19720
RegDate:        2001-02-07
Updated:        2020-06-30    
Ref:            https://rdap.arin.net/registry/autnum/19720


OrgName:        Cablevision Systems Corp.
OrgId:          CVNT
Address:        1111 Stewart Avenue
City:           Bethpage
StateProv:      NY
PostalCode:     11714
Country:        US
RegDate:        
Updated:        2025-08-06
Ref:            https://rdap.arin.net/registry/entity/CVNT


OrgAbuseHandle: OOLAB-ARIN
OrgAbuseName:   OOL Hostmaster
OrgAbusePhone:  +1-516-803-2400 
OrgAbuseEmail:  abuse@cv.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/OOLAB-ARIN

OrgTechHandle: CIO1-ARIN
OrgTechName:   Cablevision Internet Operations
OrgTechPhone:  +1-516-390-5480 
OrgTechEmail:  hostmaster@alticeusa.com
OrgTechRef:    https://rdap.arin.net/registry/entity/CIO1-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
AS6128	Cablevision Systems Corp.	US

Upstreams

AS Number	Description	Country
AS6128	Cablevision Systems Corp.	US

Contacts

Email Contacts

hostmaster@alticeusa.com

Abuse Contacts

abuse@cv.net