Report for 36727

Name

TWC-36727-NA - Charter Communications Inc, 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 AS4637) 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.

36727 INSIGHT-COMMUNICATIONS-CORP-AS1 - INSIGHT COMMUNICATIONS COMPANY, L.P.

  Adjacency:     6  Upstream:     3  Downstream:     3
  Upstream Adjacent AS list
    AS209     ASN-QWEST - Qwest
    AS3356    LEVEL3 Level 3 Communications
    AS1239    SPRINTLINK - Sprint
  Downstream Adjacent AS list
    AS40181   CWL-ASN - Community Wireless , LLC
    AS40389   BLUERIVER-ASN-0 - Blueriver Networking Services, Inc.
    AS11833   AS11833-LEAPFROG-INTERACTIVE - LeapFrog Interactive

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
233   AS36727  ORG+TRN Originate:    1195008 /11.81  Transit:      11264 /18.54 INSIGHT-COMMUNICATIONS-CORP-AS1 - INSIGHT COMMUNICATIONS COMPANY, L.P.

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       %
 1226 AS36727 INSIGHT-COMMUNICATIONS-CORP-AS1 - INSIGH     45     13      2     34     11  24.44%


  Prefix               AS Path                              Aggregation Suggestion
  74.128.0.0/15        4637 3356 36727        
  74.130.0.0/16        4637 3356 36727        
  74.131.0.0/16        4637 3491 3561 1239 36727   
  74.132.0.0/16        4637 3356 36727        
  74.133.0.0/17        4637 3356 36727        
  74.133.128.0/18      4637 3356 36727        
  74.133.192.0/18      4637 3491 3561 1239 36727   
  74.134.0.0/15        4637 3491 3561 1239 36727   
  74.134.0.0/17        4637 3491 3561 1239 36727 - Withdrawn - matching aggregate 74.134.0.0/15 4637 3491 3561 1239 36727
  74.134.128.0/17      4637 3491 3561 1239 36727 - Withdrawn - matching aggregate 74.134.0.0/15 4637 3491 3561 1239 36727
  74.135.0.0/17        4637 3491 3561 1239 36727 - Withdrawn - matching aggregate 74.134.0.0/15 4637 3491 3561 1239 36727
  74.135.128.0/17      4637 3491 3561 1239 36727 - Withdrawn - matching aggregate 74.134.0.0/15 4637 3491 3561 1239 36727
  74.136.0.0/16        4637 3491 3561 1239 36727   
  74.137.0.0/18        4637 209 36727         
  74.137.64.0/20       4637 209 36727         
  74.137.80.0/20       4637 3491 3561 1239 36727   
  74.137.96.0/19       4637 3491 3561 1239 36727 + Announce - aggregate of 74.137.96.0/20 (4637 3491 3561 1239 36727) and 74.137.112.0/20 (4637 3491 3561 1239 36727)
  74.137.96.0/20       4637 3491 3561 1239 36727 - Withdrawn - aggregated with 74.137.112.0/20 (4637 3491 3561 1239 36727)
  74.137.112.0/20      4637 3491 3561 1239 36727 - Withdrawn - aggregated with 74.137.96.0/20 (4637 3491 3561 1239 36727)
  74.137.128.0/17      4637 3491 3561 1239 36727 + Announce - aggregate of 74.137.128.0/18 (4637 3491 3561 1239 36727) and 74.137.192.0/18 (4637 3491 3561 1239 36727)
  74.137.128.0/18      4637 3491 3561 1239 36727 - Withdrawn - aggregated with 74.137.192.0/18 (4637 3491 3561 1239 36727)
  74.137.192.0/19      4637 3491 3561 1239 36727 - Withdrawn - aggregated with 74.137.224.0/19 (4637 3491 3561 1239 36727)
  74.137.224.0/19      4637 3491 3561 1239 36727 - Withdrawn - aggregated with 74.137.192.0/19 (4637 3491 3561 1239 36727)
  74.138.0.0/16        4637 3356 36727        
  74.139.0.0/16        4637 3491 3561 1239 36727   
  74.140.0.0/17        4637 3356 36727        
  74.140.128.0/17      4637 3491 3561 1239 36727   
  74.141.0.0/18        4637 3491 3561 1239 36727   
  74.141.64.0/18       4637 209 36727         
  74.141.128.0/17      4637 3491 3561 1239 36727   
  74.142.0.0/17        4637 3356 36727        
  74.142.128.0/19      4637 3356 36727        
  74.142.160.0/19      4637 3491 3561 1239 36727   
  74.142.192.0/20      4637 3356 36727        
  74.142.208.0/20      4637 3491 3561 1239 36727   
  74.142.224.0/20      4637 3491 3561 1239 36727   
  74.142.240.0/20      4637 209 36727         
  74.143.0.0/18        4637 3356 36727        
  74.143.0.0/22        4637 3356 36727      - Withdrawn - matching aggregate 74.143.0.0/18 4637 3356 36727
  74.143.8.0/21        4637 3356 36727      - Withdrawn - matching aggregate 74.143.0.0/18 4637 3356 36727
  74.143.16.0/20       4637 3356 36727      - Withdrawn - matching aggregate 74.143.0.0/18 4637 3356 36727
  74.143.32.0/19       4637 3356 36727      - Withdrawn - matching aggregate 74.143.0.0/18 4637 3356 36727
  74.143.64.0/18       4637 3491 3561 1239 36727   
  74.143.128.0/18      4637 3356 36727        
  74.143.192.0/19      4637 3491 3561 1239 36727   
  74.143.224.0/20      4637 3491 3561 1239 36727   
  74.143.240.0/20      4637 209 36727         

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

AS36727   46 More Specifics   46 Total Advertisements   INSIGHT-COMMUNICATIONS-CORP-AS1 - INSIGHT COMMUNICATIONS COMPANY, L.P.
    74.128.0.0/15                 74.128.0.0/12
    74.130.0.0/16                 74.128.0.0/12
    74.131.0.0/16                 74.128.0.0/12
    74.132.0.0/16                 74.128.0.0/12
    74.133.0.0/17                 74.128.0.0/12
    74.133.128.0/18               74.128.0.0/12
    74.133.192.0/18               74.128.0.0/12
    74.134.0.0/15                 74.128.0.0/12
    74.134.0.0/17                 74.128.0.0/12
    74.134.128.0/17               74.128.0.0/12
    74.135.0.0/17                 74.128.0.0/12
    74.135.128.0/17               74.128.0.0/12
    74.136.0.0/16                 74.128.0.0/12
    74.137.0.0/18                 74.128.0.0/12
    74.137.64.0/20                74.128.0.0/12
    74.137.80.0/20                74.128.0.0/12
    74.137.96.0/20                74.128.0.0/12
    74.137.112.0/20               74.128.0.0/12
    74.137.128.0/17               74.128.0.0/12
    74.137.128.0/18               74.128.0.0/12
    74.137.192.0/19               74.128.0.0/12
    74.137.224.0/19               74.128.0.0/12
    74.138.0.0/16                 74.128.0.0/12
    74.139.0.0/16                 74.128.0.0/12
    74.140.0.0/17                 74.128.0.0/12
    74.140.128.0/17               74.128.0.0/12
    74.141.0.0/18                 74.128.0.0/12
    74.141.64.0/18                74.128.0.0/12
    74.141.128.0/17               74.128.0.0/12
    74.142.0.0/17                 74.128.0.0/12
    74.142.128.0/19               74.128.0.0/12
    74.142.160.0/19               74.128.0.0/12
    74.142.192.0/20               74.128.0.0/12
    74.142.208.0/20               74.128.0.0/12
    74.142.224.0/20               74.128.0.0/12
    74.142.240.0/20               74.128.0.0/12
    74.143.0.0/18                 74.128.0.0/12
    74.143.0.0/22                 74.128.0.0/12
    74.143.8.0/21                 74.128.0.0/12
    74.143.16.0/20                74.128.0.0/12
    74.143.32.0/19                74.128.0.0/12
    74.143.64.0/18                74.128.0.0/12
    74.143.128.0/18               74.128.0.0/12
    74.143.192.0/19               74.128.0.0/12
    74.143.224.0/20               74.128.0.0/12
    74.143.240.0/20               74.128.0.0/12

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

    + 74.137.128.0/17             Announced

Whois Entry

whois: 402603

IANA has recorded AS36727 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS36727\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:       36727
             ASName:         TWC-36727-NA
             ASHandle:       AS36727
             RegDate:        2006-03-30
             Updated:        2018-11-27
             Ref:            https://rdap.arin.net/registry/autnum/36727
             
             
             
             OrgName:        Charter Communications Inc
             OrgId:          CC-3517
             Address:        6175 S. Willow Dr
             City:           Greenwood Village
             StateProv:      CO
             PostalCode:     80111
             Country:        US
             RegDate:        2018-10-10
             Updated:        2022-09-14
             Comment:        Legacy Time Warner Cable IP Assets
             Ref:            https://rdap.arin.net/registry/entity/CC-3517
             
             
             OrgTechHandle: IPADD1-ARIN
             OrgTechName:   IPAddressing
             OrgTechPhone:  +1-866-248-7662 
             OrgTechEmail:  PublicIPAddressing@charter.com
             OrgTechRef:    https://rdap.arin.net/registry/entity/IPADD1-ARIN
             
             OrgAbuseHandle: ABUSE19-ARIN
             OrgAbuseName:   Abuse
             OrgAbusePhone:  +1-877-777-2263 
             OrgAbuseEmail:  abuse@charter.net
             OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE19-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.
             #