Report for 33660

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 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.

33660 CMCS, US

  Adjacency:    60  Upstream:     2  Downstream:    58
  Upstream Adjacent AS list
    AS3356          LEVEL3, US
    AS7922          COMCAST-7922, US
  Downstream Adjacent AS list
    AS11688         LTSTREAM, US
    AS11791         SLC-IDENT-AS, US
    AS14034         SWIRE-COCA-COLA-USA-DRAPER-REDUNDANT-ACCESS, US
    AS14950         LHM-GROUP, US
    AS19648         LDSCHURCH1, US
    AS20229         MERRICK-AS, US
    AS19831         STAMPIN, US
    AS25655         OSTK-COM, US
    AS27480         MTC-CORP, US
    AS29919         29919, US
    AS29864         SPORTSMANS-WAREHOUSE, US
    AS26740         LIFEWAVE-ORG-1, US
    AS32230         PRESTIGEFINANCIAL1420, US
    AS393546        ARUP, US
    AS393557        PCMC, US
    AS393917        CVE, US
    AS397157        -Reserved AS-, ZZ
    AS399885        EVANS-SUTHERLAND-ASN, US
    AS400988        SLCO-ASN-01, US
    AS46367         URSAS, US
    AS55018         PRIME, US
    AS54977         MERITMEDICAL, US
    AS63169         BMA, US
    AS30639         CMCFLEX, US
    AS13335         CLOUDFLARENET, US
    AS13610         PROVOCRAFT-NOVELTY, US
    AS27625         UBNT-AS, US
    AS29960         QUALTRICS-01, US
    AS29298         SUSE, DE
    AS394662        UFAASNUM, US
    AS53882         COMMUNITECT, US
    AS14149         ICONFITNESS-MAIN, US
    AS393940        ULTRADENT-PRODUCTS, US
    AS17206         MOUNTAIN-AMERICA, US
    AS17150         AFCU, US
    AS32602         CORP-HDQTRS, US
    AS11052         IHC-NET, US
    AS11396         TWC-ASN, US
    AS19477         FLYINGJ, US
    AS23154         SANMINA-SCI, US
    AS16785         USANA-INC, US
    AS33741         DENNIS-GROUP, US
    AS33173         MYGN-, US
    AS393541        ESS-CORP, US
    AS394185        BOU-BANCORP, US
    AS395994        VECC911, US
    AS399421        EMI-HEALTH, US
    AS400284        LTP-USDC-FO-01, US
    AS399965        UTAH-JAZZ, US
    AS397612        ANX, US
    AS393459        DOMOINC772, US
    AS27178         HSPS-HQ, US
    AS54629         AFSTORES-AS, US
    AS55251         TAXHAWK-AS, US
    AS54308         RETOUCHUP, US
    AS40644         IFS, US
    AS23389         CAMPBELL-SCIENTIFIC, US
    AS10786         CHARTWAY-FCU, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
22442 AS33660        ORG+TRN Originate:       2560 /20.68  Transit:       8192 /19.00 CMCS, 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       %
22370 AS33660       CMCS, US                                          10      2      1      9      1  10.00%


  Prefix               AS Path                              Aggregation Suggestion
  50.204.89.0/24       3257 7922 33660        
  50.207.68.0/24       3257 7922 33660        
  50.217.32.0/24       3257 7922 33660        
  50.222.146.0/24      3257 7922 33660        
  50.222.157.0/24      3257 7922 33660        
  50.224.25.0/24       3257 7922 33660        
  50.237.123.0/24      6939 7922 33660        
  129.134.166.0/23     3257 7922 33660      + Announce - aggregate of 129.134.166.0/24 (3257 7922 33660) and 129.134.167.0/24 (3257 7922 33660)
  129.134.166.0/24     3257 7922 33660      - Withdrawn - aggregated with 129.134.167.0/24 (3257 7922 33660)
  129.134.167.0/24     3257 7922 33660      - Withdrawn - aggregated with 129.134.166.0/24 (3257 7922 33660)
  192.16.177.0/24      7018 7922 33660        

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

AS33660   20 More Specifics   21 Total Advertisements   CMCS, US
    50.168.66.0/24                50.128.0.0/9
    50.202.61.0/24                50.128.0.0/9
    50.203.161.0/24               50.128.0.0/9
    50.204.89.0/24                50.128.0.0/9
    50.207.68.0/24                50.128.0.0/9
    50.217.32.0/24                50.128.0.0/9
    50.221.5.0/24                 50.128.0.0/9
    50.222.146.0/24               50.128.0.0/9
    50.222.157.0/24               50.128.0.0/9
    50.224.25.0/24                50.128.0.0/9
    50.224.26.0/24                50.128.0.0/9
    50.227.51.0/24                50.128.0.0/9
    50.234.186.0/24               50.128.0.0/9
    50.237.123.0/24               50.128.0.0/9
    50.238.157.0/24               50.128.0.0/9
    107.0.221.0/24                107.0.0.0/14
    107.1.67.0/24                 107.0.0.0/14
    107.1.111.0/24                107.0.0.0/14
    129.134.166.0/24              129.134.0.0/16
    129.134.167.0/24              129.134.0.0/16

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

    + 50.202.61.0/24              Announced
    + 50.203.161.0/24             Announced
    + 50.234.186.0/24             Announced
    + 50.238.157.0/24             Announced
    + 107.1.67.0/24               Announced

Whois Entry

whois: 402551

IANA has recorded AS33660 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS33660\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:       33660
             ASName:         CMCS
             ASHandle:       AS33660
             RegDate:        2005-02-16
             Updated:        2021-01-25
             Ref:            https://rdap.arin.net/registry/autnum/33660
             
             
             
             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.
             #