Report for 33655

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 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.

33655 DNEO-OSP7 - Comcast Cable Communications, Inc.

  Adjacency:     1  Upstream:     1  Downstream:     0
  Upstream Adjacent AS list
    AS7018    ATT-INTERNET4 - AT&T WorldNet Services

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
1078  AS33655  ORIGIN  Originate:     155136 /14.76  Transit:          0 /0.00  DNEO-OSP7 - Comcast Cable Communications, Inc.

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       %
 4176 AS33655 DNEO-OSP7 - Comcast Cable Communications     28      3      1     26      2   7.14%


  Prefix               AS Path                              Aggregation Suggestion
  24.2.0.0/19          4637 3491 3561 7018 33655   
  66.208.222.0/24      4637 3491 3561 7018 33655   
  67.162.176.0/20      4637 3491 3561 7018 33655   
  67.178.45.0/24       4637 3491 3561 7018 33655   
  67.179.141.0/24      4637 3491 3561 7018 33655   
  68.34.128.0/20       4637 3491 3561 7018 33655   
  68.46.192.0/20       4637 3491 3561 7018 33655   
  68.87.234.0/24       4637 3491 3561 7018 33655   
  69.240.208.0/22      4637 3491 3561 7018 33655   
  69.242.128.0/18      4637 3491 3561 7018 33655   
  69.243.240.0/20      4637 3491 3561 7018 33655   
  69.247.160.0/20      4637 3491 3561 7018 33655   
  69.247.192.0/19      4637 3491 3561 7018 33655   
  69.254.224.0/19      4637 3491 3561 7018 33655   
  70.88.80.0/23        4637 3491 3561 7018 33655   
  70.88.84.0/24        4637 3491 3561 7018 33655   
  70.91.182.0/24       4637 3491 3561 7018 33655   
  71.199.64.0/20       4637 3491 3561 7018 33655   
  73.58.0.0/16         4637 3491 3561 7018 33655 + Announce - aggregate of 73.58.0.0/17 (4637 3491 3561 7018 33655) and 73.58.128.0/17 (4637 3491 3561 7018 33655)
  73.58.0.0/17         4637 3491 3561 7018 33655 - Withdrawn - aggregated with 73.58.128.0/17 (4637 3491 3561 7018 33655)
  73.58.128.0/18       4637 3491 3561 7018 33655 - Withdrawn - aggregated with 73.58.192.0/18 (4637 3491 3561 7018 33655)
  73.58.192.0/18       4637 3491 3561 7018 33655 - Withdrawn - aggregated with 73.58.128.0/18 (4637 3491 3561 7018 33655)
  73.116.64.0/20       4637 3491 3561 7018 33655   
  74.19.128.0/20       4637 3491 3561 7018 33655   
  74.93.167.0/24       4637 3491 3561 7018 33655   
  74.95.110.0/24       4637 3491 3561 7018 33655   
  74.144.16.0/20       4637 3491 3561 7018 33655   
  74.158.64.0/20       4637 3491 3561 7018 33655   
  76.133.192.0/20      4637 3491 3561 7018 33655   

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

AS33655   30 More Specifics   30 Total Advertisements   DNEO-OSP7 - Comcast Cable Communications, Inc.
    24.2.0.0/19                   24.0.0.0/12
    66.208.222.0/24               66.208.192.0/18
    67.162.176.0/20               67.160.0.0/11
    67.178.45.0/24                67.160.0.0/11
    67.179.141.0/24               67.160.0.0/11
    68.34.128.0/20                68.32.0.0/11
    68.46.192.0/20                68.32.0.0/11
    68.87.234.0/24                68.80.0.0/13
    69.240.208.0/22               69.240.0.0/12
    69.242.128.0/18               69.240.0.0/12
    69.243.240.0/20               69.240.0.0/12
    69.247.160.0/20               69.240.0.0/12
    69.247.192.0/19               69.240.0.0/12
    69.254.224.0/19               69.240.0.0/12
    70.88.80.0/23                 70.88.0.0/14
    70.88.84.0/24                 70.88.0.0/14
    70.91.182.0/24                70.88.0.0/14
    71.199.64.0/20                71.192.0.0/12
    73.58.0.0/17                  73.0.0.0/8
    73.58.128.0/18                73.0.0.0/8
    73.58.192.0/18                73.0.0.0/8
    73.116.64.0/20                73.0.0.0/8
    74.19.128.0/20                74.16.0.0/12
    74.93.167.0/24                74.92.0.0/14
    74.95.110.0/24                74.92.0.0/14
    74.144.16.0/20                74.144.0.0/12
    74.158.64.0/20                74.144.0.0/12
    75.146.133.0/24               75.144.0.0/14
    76.133.192.0/20               76.128.0.0/11
    76.159.32.0/20                76.128.0.0/11

Whois Entry

whois: 402332

IANA has recorded AS33655 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS33655\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:       33655
             ASName:         CMCS
             ASHandle:       AS33655
             RegDate:        2005-02-16
             Updated:        2021-01-25
             Ref:            https://rdap.arin.net/registry/autnum/33655
             
             
             
             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.
             #