Report for 20231

Name

TWC-20231-NE-KS-C3 - 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.

20231 ROADRUNNER-CENTRAL - Road Runner HoldCo LLC

  Adjacency:    11  Upstream:     1  Downstream:    10
  Upstream Adjacent AS list
    AS11955   SCRR-11955 - Road Runner HoldCo LLC
  Downstream Adjacent AS list
    AS11910   MIDWESTAIR - Midwest Air Group, Inc
    AS16603   BELLAMIA - Bella Mia, Inc.
    AS16688   PEOPLENET-COMM-AS - PeopleNet Communications Corp
    AS25971   MILWAUKEE-PS - Milwaukee Public Schools
    AS14192   CARTHA-ASN - Carthage College
    AS36001   BERTRANCORP - Bertram Corporation
    AS27606   RUNZNET - RUNZHEIMER INTERNATIONAL
    AS40379   PIO-1846 - Carroll College
    AS40378   BUCYRUSINT - BUCYRUS INTERNATIONAL, INC
    AS13847   ARINET - ARI Network Services Inc.

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
440   AS20231  ORG+TRN Originate:     542976 /12.95  Transit:     137728 /14.93 ROADRUNNER-CENTRAL - Road Runner HoldCo LLC

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       %
 2230 AS20231 ROADRUNNER-CENTRAL - Road Runner HoldCo      62     10      5     57      5   8.06%


  Prefix               AS Path                              Aggregation Suggestion
  24.94.192.0/19       4637 3356 11955 20231   
  24.106.40.0/21       4637 3356 11955 20231   
  24.106.48.0/22       4637 3356 11955 20231   
  24.145.168.0/21      4637 3356 11955 20231   
  24.145.192.0/20      4637 3356 11955 20231   
  24.160.224.0/19      4637 3356 11955 20231   
  24.167.192.0/18      4637 3356 11955 20231 + Announce - aggregate of 24.167.192.0/19 (4637 3356 11955 20231) and 24.167.224.0/19 (4637 3356 11955 20231)
  24.167.192.0/19      4637 3356 11955 20231 - Withdrawn - aggregated with 24.167.224.0/19 (4637 3356 11955 20231)
  24.167.224.0/19      4637 3356 11955 20231 - Withdrawn - aggregated with 24.167.192.0/19 (4637 3356 11955 20231)
  24.208.104.0/22      4637 3356 11955 20231   
  24.208.108.0/24      4637 3356 11955 20231   
  24.209.112.0/20      4637 3356 11955 20231   
  24.209.128.0/18      4637 3356 11955 20231 + Announce - aggregate of 24.209.128.0/19 (4637 3356 11955 20231) and 24.209.160.0/19 (4637 3356 11955 20231)
  24.209.128.0/19      4637 3356 11955 20231 - Withdrawn - aggregated with 24.209.160.0/19 (4637 3356 11955 20231)
  24.209.160.0/19      4637 3356 11955 20231 - Withdrawn - aggregated with 24.209.128.0/19 (4637 3356 11955 20231)
  24.211.0.0/19        4637 3356 11955 20231   
  24.223.192.0/20      4637 3356 11955 20231   
  65.25.160.0/19       4637 3356 11955 20231   
  65.26.192.0/18       4637 1668 11955 20231   
  65.27.48.0/20        4637 1668 11955 20231   
  65.29.0.0/18         4637 1668 11955 20231   
  65.29.128.0/18       4637 1668 11955 20231   
  65.30.128.0/18       4637 1668 11955 20231   
  65.30.192.0/19       4637 3356 11955 11955 20231   
  65.30.224.0/19       4637 1668 11955 20231   
  65.31.80.0/20        4637 3356 11955 11955 20231   
  65.31.96.0/19        4637 3356 11955 11955 20231   
  65.31.128.0/18       4637 3356 11955 11955 20231   
  66.232.226.0/23      4637 3356 11955 20231   
  67.48.0.0/20         4637 3356 11955 20231   
  67.48.32.0/19        4637 1668 11955 20231   
  67.48.192.0/19       4637 1668 11955 20231   
  67.52.56.0/22        4637 3356 11955 20231   
  67.53.128.0/19       4637 1668 11955 20231   
  67.53.176.0/21       4637 1668 11955 20231   
  67.53.224.0/21       4637 1668 11955 20231   
  67.53.232.0/21       4637 3356 11955 20231   
  69.23.32.0/19        4637 1668 11955 20231   
  69.23.192.0/19       4637 1668 11955 20231   
  69.76.32.0/20        4637 1668 11955 20231   
  69.76.64.0/18        4637 1668 11955 20231   
  69.81.112.0/21       4637 3356 11955 20231   
  69.81.192.0/20       4637 1668 11955 20231   
  70.92.0.0/19         4637 3356 11955 20231   
  70.92.128.0/18       4637 1668 11955 20231   
  70.92.192.0/18       4637 3356 11955 20231   
  72.128.64.0/18       4637 3356 11955 20231   
  72.128.160.0/19      4637 3356 11955 20231   
  72.128.192.0/19      4637 1668 11955 20231   
  72.128.224.0/20      4637 3356 11955 20231   
  72.128.240.0/20      4637 1668 11955 20231   
  72.131.0.0/17        4637 1668 11955 20231 + Announce - aggregate of 72.131.0.0/18 (4637 1668 11955 20231) and 72.131.64.0/18 (4637 1668 11955 20231)
  72.131.0.0/18        4637 1668 11955 20231 - Withdrawn - aggregated with 72.131.64.0/18 (4637 1668 11955 20231)
  72.131.64.0/18       4637 1668 11955 20231 - Withdrawn - aggregated with 72.131.0.0/18 (4637 1668 11955 20231)
  72.131.128.0/18      4637 3356 11955 20231   
  72.131.240.0/20      4637 3356 11955 20231   
  72.133.128.0/18      4637 1668 11955 20231   
  72.133.192.0/19      4637 3356 11955 20231   
  72.135.56.0/21       4637 3356 11955 20231   
  72.135.80.0/20       4637 3356 11955 20231   
  72.135.128.0/17      4637 3356 11955 11955 20231 + Announce - aggregate of 72.135.128.0/18 (4637 3356 11955 11955 20231) and 72.135.192.0/18 (4637 3356 11955 11955 20231)
  72.135.128.0/18      4637 3356 11955 11955 20231 - Withdrawn - aggregated with 72.135.192.0/18 (4637 3356 11955 11955 20231)
  72.135.192.0/18      4637 3356 11955 11955 20231 - Withdrawn - aggregated with 72.135.128.0/18 (4637 3356 11955 11955 20231)
  75.86.0.0/16         4637 1668 11955 20231   
  204.194.250.0/23     4637 3356 11955 20231 + Announce - aggregate of 204.194.250.0/24 (4637 3356 11955 20231) and 204.194.251.0/24 (4637 3356 11955 20231)
  204.194.250.0/24     4637 3356 11955 20231 - Withdrawn - aggregated with 204.194.251.0/24 (4637 3356 11955 20231)
  204.194.251.0/24     4637 3356 11955 20231 - Withdrawn - aggregated with 204.194.250.0/24 (4637 3356 11955 20231)

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

AS20231   76 More Specifics   76 Total Advertisements   ROADRUNNER-CENTRAL - Road Runner HoldCo LLC
    24.31.64.0/19                 24.31.64.0/18
    24.94.192.0/19                24.94.0.0/15
    24.106.40.0/21                24.106.0.0/18
    24.106.48.0/22                24.106.0.0/18
    24.145.168.0/21               24.145.128.0/17
    24.145.192.0/20               24.145.128.0/17
    24.160.224.0/19               24.160.0.0/13
    24.167.192.0/19               24.160.0.0/13
    24.167.224.0/19               24.160.0.0/13
    24.208.104.0/22               24.208.0.0/14
    24.208.108.0/24               24.208.0.0/14
    24.209.112.0/20               24.208.0.0/14
    24.209.128.0/19               24.208.0.0/14
    24.209.160.0/19               24.208.0.0/14
    24.211.0.0/19                 24.208.0.0/14
    24.223.192.0/20               24.223.128.0/17
    65.25.160.0/19                65.24.0.0/14
    65.26.192.0/18                65.24.0.0/14
    65.27.48.0/20                 65.24.0.0/14
    65.29.0.0/18                  65.28.0.0/14
    65.29.128.0/18                65.28.0.0/14
    65.30.128.0/18                65.28.0.0/14
    65.30.192.0/19                65.28.0.0/14
    65.30.224.0/19                65.28.0.0/14
    65.31.80.0/20                 65.28.0.0/14
    65.31.96.0/19                 65.28.0.0/14
    65.31.128.0/18                65.28.0.0/14
    66.232.224.0/23               66.232.224.0/20
    66.232.226.0/23               66.232.224.0/20
    67.48.0.0/20                  67.48.0.0/15
    67.48.32.0/19                 67.48.0.0/15
    67.48.64.0/19                 67.48.0.0/15
    67.48.64.0/20                 67.48.0.0/15
    67.48.80.0/20                 67.48.0.0/15
    67.48.192.0/19                67.48.0.0/15
    67.52.56.0/22                 67.52.0.0/15
    67.53.128.0/19                67.52.0.0/15
    67.53.176.0/21                67.52.0.0/15
    67.53.224.0/21                67.52.0.0/15
    67.53.232.0/21                67.52.0.0/15
    69.23.32.0/19                 69.23.0.0/16
    69.23.128.0/19                69.23.0.0/16
    69.23.192.0/19                69.23.0.0/16
    69.23.224.0/20                69.23.0.0/16
    69.76.32.0/20                 69.75.0.0/15
    69.76.64.0/18                 69.75.0.0/15
    69.81.112.0/21                69.81.0.0/16
    69.81.192.0/20                69.81.0.0/16
    70.92.0.0/19                  70.92.0.0/14
    70.92.128.0/18                70.92.0.0/14
    70.92.192.0/18                70.92.0.0/14
    72.128.64.0/18                72.128.0.0/13
    72.128.160.0/19               72.128.0.0/13
    72.128.192.0/19               72.128.0.0/13
    72.128.224.0/20               72.128.0.0/13
    72.128.240.0/20               72.128.0.0/13
    72.131.0.0/18                 72.128.0.0/13
    72.131.64.0/18                72.128.0.0/13
    72.131.128.0/18               72.128.0.0/13
    72.131.240.0/20               72.128.0.0/13
    72.133.128.0/18               72.128.0.0/13
    72.133.192.0/19               72.128.0.0/13
    72.135.48.0/20                72.128.0.0/13
    72.135.48.0/21                72.128.0.0/13
    72.135.56.0/21                72.128.0.0/13
    72.135.64.0/19                72.128.0.0/13
    72.135.64.0/20                72.128.0.0/13
    72.135.80.0/20                72.128.0.0/13
    72.135.128.0/18               72.128.0.0/13
    72.135.192.0/18               72.128.0.0/13
    75.81.128.0/19                75.80.0.0/13
    75.81.160.0/20                75.80.0.0/13
    75.86.0.0/16                  75.80.0.0/13
    192.25.139.0/24               192.25.136.0/22
    204.194.250.0/24              204.194.248.0/21
    204.194.251.0/24              204.194.248.0/21

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

    + 24.31.64.0/19               Announced
    + 67.48.64.0/19               Announced
    + 67.48.64.0/20               Announced
    + 67.48.80.0/20               Announced
    + 69.23.128.0/19              Announced
    + 69.23.224.0/20              Announced
    + 72.135.48.0/20              Announced
    + 72.135.48.0/21              Announced
    + 72.135.64.0/19              Announced
    + 72.135.64.0/20              Announced
    + 75.81.128.0/19              Announced
    + 75.81.160.0/20              Announced

Whois Entry

whois: 402603

IANA has recorded AS20231 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS20231\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:       20231
             ASName:         TWC-20231-NE-KS-C3
             ASHandle:       AS20231
             RegDate:        2001-04-10
             Updated:        2022-03-15
             Ref:            https://rdap.arin.net/registry/autnum/20231
             
             
             
             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.
             #