Report for 33659

Name

CMCS - Comcast Cable Communications, LLC, 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 AS2.0) 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.

33659 CMCS - Comcast Cable Communications, LLC, US

  Adjacency:    25  Upstream:     1  Downstream:    24
  Upstream Adjacent AS list
    AS7922          COMCAST-7922 - Comcast Cable Communications, LLC, US
  Downstream Adjacent AS list
    AS10794         BANKAMERICA - Bank of America, National Association, US
    AS13913         AFFILIATED - Affiliated Monitoring, Inc., US
    AS18583         HATTERASCPC - Hatteras CPC, US
    AS21669         NJ-STATEWIDE-LIBRARY-NETWORK - New Jersey State Library, US
    AS19677         NJTRANSIT - NJTRANSIT, US
    AS14458         WORLDKITCHEN-1 - World Kitchen, LLC, US
    AS11205         CITY-OF-PHILADELPHIA - City of Philadelphia, US
    AS22774         -Reserved AS-, ZZ
    AS30597         AMBEST-ASN - A.M. Best Company, US
    AS30302         ASPEN-DENTAL-INC - ASPEN DENTAL MANAGEMENT, INC., US
    AS29891         NCCWO-ASN1-VZBLVL3CMCST - National Cable Communications LLC, US
    AS33523         ROWANUNIVERSITY - Rowan University, US
    AS394206        DHLC-AS - Deborah Heart and Lung Center, US
    AS394096        CAPEREGIONALHEALTHSYSTEM - Cape Regional Medical Center, Inc., US
    AS400110        ANUVU-AVI-01 - Anuvu Operations LLC, US
    AS40886         PRAC - Plymouth Rock Assurance Corporation, US
    AS53291         WSFS-ASN - WSFS Bank, US
    AS40159         PRINCETON-REGIONAL-SCHOOLS - Princeton Public Schools, US
    AS54282         JJINTEROP - Johnson & Johnson, US
    AS63193         AHS - Atlanticare Health System Inc., US
    AS54268         CAPITALHEALTH - Capital Health System, Inc, US
    AS397589        AMERICAN-DREAM-NJ - AMEREAM NJP, LLC, US
    AS36040         YOUTUBE - Google LLC, US
    AS33141         NOCSERVICES - NOC SERVICES CORP., US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
3950  AS33659        ORG+TRN Originate:      64000 /16.03  Transit:     144128 /14.86 CMCS - Comcast Cable Communications, LLC, 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       %
 4029 AS33659       CMCS - Comcast Cable Communications, LLC, US      92     20      7     79     13  14.13%


  Prefix               AS Path                              Aggregation Suggestion
  9.142.0.0/19         4777 2516 7922 33659   
  23.227.64.0/22       4777 2516 7922 33659   
  23.227.92.0/22       4777 2516 7922 33659   
  23.234.144.0/22      4777 2516 7922 33659   
  23.234.152.0/22      4777 2516 7922 33659   
  31.132.54.0/23       4777 2516 7922 33659   
  45.58.208.0/24       4777 2516 7922 33659   
  45.58.210.0/23       4777 2516 7922 33659   
  45.58.212.0/22       4777 2516 7922 33659   
  45.58.240.0/22       4777 2516 7922 33659   
  45.58.245.0/24       4777 2516 7922 33659   
  45.58.250.0/24       4777 2516 7922 33659   
  45.58.252.0/22       4777 2516 7922 33659   
  45.150.168.0/22      4777 2516 7922 33659   
  45.151.196.0/22      4777 2516 7922 33659   
  45.248.54.0/24       4777 2516 7922 33659   
  50.207.78.0/24       4777 2516 7922 33659   
  50.218.16.0/24       4777 2516 7922 33659   
  50.223.132.0/24      4777 2516 7922 33659   
  50.226.61.0/24       4777 2516 7922 33659   
  50.228.255.0/24      4777 2516 7922 33659   
  50.229.146.0/24      4777 2516 7922 33659   
  50.231.89.0/24       4777 2516 7922 33659   
  50.231.144.0/24      4777 2516 7922 33659   
  50.231.154.0/24      4777 2516 7922 33659   
  50.231.216.0/24      4777 2516 7922 33659   
  50.235.249.0/24      4777 2516 7922 33659   
  50.238.108.0/23      4777 2516 7922 33659 + Announce - aggregate of 50.238.108.0/24 (4777 2516 7922 33659) and 50.238.109.0/24 (4777 2516 7922 33659)
  50.238.108.0/24      4777 2516 7922 33659 - Withdrawn - aggregated with 50.238.109.0/24 (4777 2516 7922 33659)
  50.238.109.0/24      4777 2516 7922 33659 - Withdrawn - aggregated with 50.238.108.0/24 (4777 2516 7922 33659)
  52.128.192.0/22      4777 2516 7922 33659   
  52.128.204.0/22      4777 2516 7922 33659   
  52.128.220.0/22      4777 2516 7922 33659   
  63.246.150.0/24      4777 2516 7922 33659   
  64.52.28.0/22        4777 2516 7922 33659   
  64.93.84.0/22        4777 2516 7922 33659   
  64.112.8.0/22        4777 2516 7922 33659   
  64.253.90.0/24       4777 2516 7922 33659   
  68.234.42.0/24       4777 2516 7922 33659   
  69.30.72.0/22        4777 2516 7922 33659 + Announce - aggregate of 69.30.72.0/23 (4777 2516 7922 33659) and 69.30.74.0/23 (4777 2516 7922 33659)
  69.30.72.0/24        4777 2516 7922 33659 - Withdrawn - aggregated with 69.30.73.0/24 (4777 2516 7922 33659)
  69.30.73.0/24        4777 2516 7922 33659 - Withdrawn - aggregated with 69.30.72.0/24 (4777 2516 7922 33659)
  69.30.74.0/24        4777 2516 7922 33659 - Withdrawn - aggregated with 69.30.75.0/24 (4777 2516 7922 33659)
  69.30.75.0/24        4777 2516 7922 33659 - Withdrawn - aggregated with 69.30.74.0/24 (4777 2516 7922 33659)
  69.30.76.0/23        4777 2516 7922 33659 + Announce - aggregate of 69.30.76.0/24 (4777 2516 7922 33659) and 69.30.77.0/24 (4777 2516 7922 33659)
  69.30.76.0/24        4777 2516 7922 33659 - Withdrawn - aggregated with 69.30.77.0/24 (4777 2516 7922 33659)
  69.30.77.0/24        4777 2516 7922 33659 - Withdrawn - aggregated with 69.30.76.0/24 (4777 2516 7922 33659)
  69.91.139.0/24       4777 2516 7922 33659   
  69.91.140.0/24       4777 2516 7922 33659   
  69.91.143.0/24       4777 2516 7922 33659   
  69.91.144.0/24       4777 2516 7922 33659   
  69.91.151.0/24       4777 2516 7922 33659   
  69.91.152.0/24       4777 2516 7922 33659   
  69.91.154.0/23       4777 2516 7922 33659 + Announce - aggregate of 69.91.154.0/24 (4777 2516 7922 33659) and 69.91.155.0/24 (4777 2516 7922 33659)
  69.91.154.0/24       4777 2516 7922 33659 - Withdrawn - aggregated with 69.91.155.0/24 (4777 2516 7922 33659)
  69.91.155.0/24       4777 2516 7922 33659 - Withdrawn - aggregated with 69.91.154.0/24 (4777 2516 7922 33659)
  69.91.156.0/24       4777 2516 7922 33659   
  69.91.160.0/24       4777 2516 7922 33659   
  69.91.166.0/24       4777 2516 7922 33659   
  78.31.205.0/24       4777 2516 7922 33659   
  95.164.224.0/22      4777 2516 7922 33659   
  107.0.169.0/24       4777 2516 7922 33659   
  107.166.16.0/20      4777 2516 7922 33659 + Announce - aggregate of 107.166.16.0/21 (4777 2516 7922 33659) and 107.166.24.0/21 (4777 2516 7922 33659)
  107.166.16.0/22      4777 2516 7922 33659 - Withdrawn - aggregated with 107.166.20.0/22 (4777 2516 7922 33659)
  107.166.20.0/22      4777 2516 7922 33659 - Withdrawn - aggregated with 107.166.16.0/22 (4777 2516 7922 33659)
  107.166.24.0/22      4777 2516 7922 33659 - Withdrawn - aggregated with 107.166.28.0/22 (4777 2516 7922 33659)
  107.166.28.0/22      4777 2516 7922 33659 - Withdrawn - aggregated with 107.166.24.0/22 (4777 2516 7922 33659)
  107.166.96.0/20      4777 2516 7922 33659 + Announce - aggregate of 107.166.96.0/21 (4777 2516 7922 33659) and 107.166.104.0/21 (4777 2516 7922 33659)
  107.166.96.0/22      4777 2516 7922 33659 - Withdrawn - aggregated with 107.166.100.0/22 (4777 2516 7922 33659)
  107.166.100.0/22     4777 2516 7922 33659 - Withdrawn - aggregated with 107.166.96.0/22 (4777 2516 7922 33659)
  107.166.104.0/22     4777 2516 7922 33659 - Withdrawn - aggregated with 107.166.108.0/22 (4777 2516 7922 33659)
  107.166.108.0/22     4777 2516 7922 33659 - Withdrawn - aggregated with 107.166.104.0/22 (4777 2516 7922 33659)
  138.226.0.0/20       4777 2516 7922 33659   
  138.226.88.0/21      4777 2516 7922 33659   
  149.143.184.0/22     4777 2516 7922 33659   
  158.62.212.0/24      4777 2516 7922 33659   
  158.62.214.0/23      4777 2516 7922 33659 + Announce - aggregate of 158.62.214.0/24 (4777 2516 7922 33659) and 158.62.215.0/24 (4777 2516 7922 33659)
  158.62.214.0/24      4777 2516 7922 33659 - Withdrawn - aggregated with 158.62.215.0/24 (4777 2516 7922 33659)
  158.62.215.0/24      4777 2516 7922 33659 - Withdrawn - aggregated with 158.62.214.0/24 (4777 2516 7922 33659)
  170.62.252.0/24      4777 2516 7922 33659   
  170.62.255.0/24      4777 2516 7922 33659   
  170.100.128.0/22     4777 2516 7922 33659   
  170.100.192.0/21     4777 2516 7922 33659   
  170.100.200.0/22     4777 2516 7922 33659   
  185.188.192.0/22     4777 2516 7922 33659   
  185.205.204.0/24     4777 2516 7922 33659   
  192.64.165.0/24      4777 2516 7922 33659   
  192.133.105.0/24     4777 2516 7922 33659   
  192.135.0.0/24       4777 2516 7922 33659   
  193.31.104.0/22      4777 2516 7922 33659   
  195.138.109.0/24     4777 2516 7922 33659   
  195.138.110.0/24     4777 2516 7922 33659   
  195.138.113.0/24     4777 2516 7922 33659   
  195.138.115.0/24     4777 2516 7922 33659   
  195.138.124.0/22     4777 2516 7922 33659   
  195.211.116.0/22     4777 2516 7922 33659   
  198.145.74.0/24      4777 2516 7922 33659   
  198.145.132.0/22     4777 2516 7922 33659   
  198.145.225.0/24     4777 2516 7922 33659   

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

AS33659   77 More Specifics   92 Total Advertisements   CMCS - Comcast Cable Communications, LLC, US
    9.142.0.0/19                  9.142.0.0/16
    23.227.64.0/22                23.227.64.0/19
    23.227.92.0/22                23.227.64.0/19
    23.234.144.0/22               23.234.128.0/18
    23.234.152.0/22               23.234.128.0/18
    31.132.54.0/23                31.132.52.0/22
    45.58.208.0/24                45.58.192.0/18
    45.58.210.0/23                45.58.192.0/18
    45.58.212.0/22                45.58.192.0/18
    45.58.240.0/22                45.58.192.0/18
    45.58.245.0/24                45.58.192.0/18
    45.58.250.0/24                45.58.192.0/18
    45.58.252.0/22                45.58.192.0/18
    45.248.54.0/24                45.248.52.0/22
    50.207.78.0/24                50.128.0.0/9
    50.218.16.0/24                50.128.0.0/9
    50.223.132.0/24               50.128.0.0/9
    50.226.61.0/24                50.128.0.0/9
    50.228.255.0/24               50.128.0.0/9
    50.229.146.0/24               50.128.0.0/9
    50.231.89.0/24                50.128.0.0/9
    50.231.144.0/24               50.128.0.0/9
    50.231.154.0/24               50.128.0.0/9
    50.231.216.0/24               50.128.0.0/9
    50.235.249.0/24               50.128.0.0/9
    50.238.108.0/24               50.128.0.0/9
    50.238.109.0/24               50.128.0.0/9
    52.128.192.0/22               52.128.192.0/19
    52.128.204.0/22               52.128.192.0/19
    52.128.220.0/22               52.128.192.0/19
    63.246.150.0/24               63.246.144.0/21
    64.52.28.0/22                 64.52.24.0/21
    64.253.90.0/24                64.253.80.0/20
    68.234.42.0/24                68.234.40.0/21
    69.30.72.0/24                 69.30.64.0/20
    69.30.73.0/24                 69.30.64.0/20
    69.30.74.0/24                 69.30.64.0/20
    69.30.75.0/24                 69.30.64.0/20
    69.30.76.0/24                 69.30.64.0/20
    69.30.77.0/24                 69.30.64.0/20
    69.91.139.0/24                69.91.128.0/18
    69.91.140.0/24                69.91.128.0/18
    69.91.143.0/24                69.91.128.0/18
    69.91.144.0/24                69.91.128.0/18
    69.91.151.0/24                69.91.128.0/18
    69.91.152.0/24                69.91.128.0/18
    69.91.154.0/24                69.91.128.0/18
    69.91.155.0/24                69.91.128.0/18
    69.91.156.0/24                69.91.128.0/18
    69.91.160.0/24                69.91.128.0/18
    69.91.166.0/24                69.91.128.0/18
    78.31.205.0/24                78.31.204.0/22
    95.164.224.0/22               95.164.0.0/16
    107.0.169.0/24                107.0.0.0/14
    107.166.16.0/22               107.166.0.0/16
    107.166.20.0/22               107.166.0.0/16
    107.166.24.0/22               107.166.0.0/16
    107.166.28.0/22               107.166.0.0/16
    107.166.96.0/22               107.166.0.0/16
    107.166.100.0/22              107.166.0.0/16
    107.166.104.0/22              107.166.0.0/16
    107.166.108.0/22              107.166.0.0/16
    138.226.0.0/20                138.226.0.0/17
    138.226.88.0/21               138.226.0.0/17
    149.143.184.0/22              149.143.128.0/18
    158.62.212.0/24               158.62.208.0/20
    158.62.214.0/24               158.62.208.0/20
    158.62.215.0/24               158.62.208.0/20
    185.205.204.0/24              185.205.204.0/22
    195.138.109.0/24              195.138.96.0/19
    195.138.110.0/24              195.138.96.0/19
    195.138.113.0/24              195.138.96.0/19
    195.138.115.0/24              195.138.96.0/19
    195.138.124.0/22              195.138.96.0/19
    198.145.74.0/24               198.145.72.0/21
    198.145.132.0/22              198.145.128.0/19
    198.145.225.0/24              198.145.224.0/20

Bogus ASes Announced by this AS

Bogus AS		Announcing-AS
AS22774	Announced by	AS33659	CMCS - Comcast Cable Communications, LLC, US

Whois Entry

whois: 402332

IANA has recorded AS33659 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS33659\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:       33659
             ASName:         CMCS
             ASHandle:       AS33659
             RegDate:        2005-02-16
             Updated:        2021-01-25
             Ref:            https://rdap.arin.net/registry/autnum/33659
             
             
             
             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
             
             
             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
             
             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
             
             
             #
             # 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.
             #