Report for 19720

Name

CABLEVISION-CORP - Cablevision Systems Corp., US

AS Adjacency Report

In the context of this report "Upstream" indicates that there is an adjacent AS that lines between the BGP table collection point (in this case at AS6447) and the specified AS. Similarly, "Downstream" refers to an adjacent AS that lies beyond the specified AS. This upstream / downstream categorisation is strictly a description relative topology, and should not be confused with provider / customer / peer inter-AS relationships.

19720 CABLEVISION-CORP, US

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS6128          CABLE-NET-1, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
23434 AS19720        ORIGIN  Originate:       2304 /20.83  Transit:          0 /0.00  CABLEVISION-CORP, US

Aggregation Suggestions

        Filter: Aggregates, Specifics

This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.

 Rank AS            AS Name                                      Current  Wthdw  Aggte  Annce Redctn       %
16119 AS19720       CABLEVISION-CORP, US                               9      4      2      7      2  22.22%


  Prefix               AS Path                              Aggregation Suggestion
  65.51.29.0/24        49788 1299 6128 19720   
  65.51.31.0/24        49788 1299 6128 19720   
  167.206.119.0/24     6939 6128 19720        
  167.206.120.0/24     6939 6128 19720        
  167.206.122.0/23     6939 6128 19720      + Announce - aggregate of 167.206.122.0/24 (6939 6128 19720) and 167.206.123.0/24 (6939 6128 19720)
  167.206.122.0/24     6939 6128 19720      - Withdrawn - aggregated with 167.206.123.0/24 (6939 6128 19720)
  167.206.123.0/24     6939 6128 19720      - Withdrawn - aggregated with 167.206.122.0/24 (6939 6128 19720)
  216.2.193.0/24       293 6128 19720         
  216.2.194.0/23       49788 1299 6128 19720 + Announce - aggregate of 216.2.194.0/24 (49788 1299 6128 19720) and 216.2.195.0/24 (49788 1299 6128 19720)
  216.2.194.0/24       49788 1299 6128 19720 - Withdrawn - aggregated with 216.2.195.0/24 (49788 1299 6128 19720)
  216.2.195.0/24       49788 1299 6128 19720 - Withdrawn - aggregated with 216.2.194.0/24 (49788 1299 6128 19720)

Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.

AS19720   9 More Specifics   9 Total Advertisements   CABLEVISION-CORP, US
    65.51.29.0/24                 65.51.0.0/16
    65.51.30.0/24                 65.51.0.0/16
    65.51.31.0/24                 65.51.0.0/16
    167.206.119.0/24              167.206.0.0/16
    167.206.120.0/24              167.206.0.0/16
    167.206.122.0/24              167.206.0.0/16
    167.206.123.0/24              167.206.0.0/16
    216.2.192.0/22                216.0.0.0/14
    216.2.193.0/24                216.0.0.0/14
    216.2.194.0/24                216.0.0.0/14
    216.2.195.0/24                216.0.0.0/14

Prefixes added and withdrawn by this origin AS in the past 7 days.

    + 216.2.192.0/22              Announced
    - 216.2.194.0/24              Withdrawn
    - 216.2.195.0/24              Withdrawn

Whois Entry

whois: 402590

IANA has recorded AS19720 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS19720\n             
             #
             # 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
             
             
             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
             
             OrgAbuseHandle: OOLAB-ARIN
             OrgAbuseName:   OOL Hostmaster
             OrgAbusePhone:  +1-516-803-2400 
             OrgAbuseEmail:  abuse@cv.net
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/OOLAB-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.
             #