Report for 33667

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.

33667 CMCS - Comcast Cable Communications, LLC, US

  Adjacency:    38  Upstream:     2  Downstream:    36
  Upstream Adjacent AS list
    AS3356          LEVEL3 - Level 3 Parent, LLC, US
    AS7922          COMCAST-7922 - Comcast Cable Communications, LLC, US
  Downstream Adjacent AS list
    AS11829         CADENCE - Cadence Design Systems, Inc., US
    AS13511         UNIVI-2-ASN - Univision Communications Inc., US
    AS18841         TRIMBLE-SNVL - Trimble, Inc., US
    AS27580         ENGINEERING-ASN1 - CONVERGEONE HOLDINGS, INC., US
    AS398572        MONOLITHICPOWER-SJC - Monolithic Power Systems,Inc, US
    AS33161         CHUMASH-ENTERPRISES - Chumash Casino Resort, US
    AS13335         CLOUDFLARENET - Cloudflare, Inc., US
    AS11620         SUCCEED-NET - Succeed.Net, US
    AS14443         BFS-49-14443 - Broadridge Financial Solutions, Inc., US
    AS17381         AS-WSI-ECOM-WEST - Williams-Sonoma, US
    AS13395         SMART-CITY-SOCC - SMART CITY NETWORKS, LIMITED PARTNERSHIP, US
    AS22768         SYNERGYBROADBAND-MI-02 - SYNERGY BROADBAND, US
    AS22617         SACCOURT - Superior Court of California, County of Sacramento, US
    AS20940         AKAMAI-ASN1 - Akamai International B.V., NL
    AS27009         CUSD - Clovis Unified School District, US
    AS25753         CALPERS - California Public Employees' Retirement System, US
    AS2894          CALIF-DWR - California Department of Water Resources, US
    AS32688         GOLDEN1-CU-NET - THE GOLDEN 1 CREDIT UNION, US
    AS23411         --No Registry Entry--
    AS394377        COUNTY-OF-TULARE - County of Tulare, US
    AS394121        VCH-MADERA - Valley Children's Hospital, US
    AS393935        SCCU - Sierra Central Credit Union, US
    AS396484        CITY-OF-ROSEVILLE-CA - City of Roseville, US
    AS397062        SMG - Sun-Maid Growers of California, US
    AS397813        CLARKE-MULTIHOME-IP-BLOCK - Clarke Broadcasting Corporation, US
    AS397909        EGUSD-01 - Elk Grove Unified School District, US
    AS46341         CPUC-AS-001 - California Public Utilities Commission, US
    AS46867         AUDEAMUS - Sebastian, US
    AS53782         PCOASTP - Pacific Coast Producers, US
    AS399761        STREAMIT-001 - Stream IT Networks LLC, US
    AS398204        CITY-OF-STOCKTON - City of Stockton, US
    AS55032         JAXNET-BH-01 - The Jackson Laboratory, US
    AS397787        MEWUK-NETWORKS - Black Oak Casino, US
    AS395536        TRIMARKASSOC - Trimark Associates, inc, US
    AS36040         YOUTUBE - Google LLC, US
    AS23338         ASN-DCS-01 - DCS Pacific Star, LLC, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
18192 AS33667        ORG+TRN Originate:       3840 /20.09  Transit:     114432 /15.20 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       %
39853 AS33667       CMCS - Comcast Cable Communications, LLC, US      13      0      0     13      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  50.203.5.0/24        4777 2516 7922 33667   
  50.203.201.0/24      4777 2516 7922 33667   
  50.207.246.0/24      4777 2516 7922 33667   
  50.222.62.0/24       4777 2516 7922 33667   
  50.236.209.0/24      4777 2516 7922 33667   
  50.239.185.0/24      4777 2516 7922 33667   
  107.0.64.0/23        4777 2516 7922 33667   
  157.240.151.0/24     4777 2516 7922 33667   
  157.240.152.0/24     4777 2516 7922 33667   
  161.82.0.0/24        4777 2516 7922 33667   
  161.82.12.0/24       4777 2516 7922 33667   
  161.82.44.0/23       4777 2516 7922 33667   
  209.78.88.0/24       4777 2516 7922 33667   

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

AS33667   13 More Specifics   13 Total Advertisements   CMCS - Comcast Cable Communications, LLC, US
    50.203.5.0/24                 50.128.0.0/9
    50.203.201.0/24               50.128.0.0/9
    50.207.246.0/24               50.128.0.0/9
    50.222.62.0/24                50.128.0.0/9
    50.236.209.0/24               50.128.0.0/9
    50.239.185.0/24               50.128.0.0/9
    107.0.64.0/23                 107.0.0.0/14
    157.240.151.0/24              157.240.0.0/16
    157.240.152.0/24              157.240.0.0/16
    161.82.0.0/24                 161.82.0.0/18
    161.82.12.0/24                161.82.0.0/18
    161.82.44.0/23                161.82.0.0/18
    209.78.88.0/24                209.76.0.0/14

Bogus ASes Announced by this AS

Bogus AS		Announcing-AS
AS23411	Announced by	AS33667	CMCS - Comcast Cable Communications, LLC, US

Whois Entry

whois: 402599

IANA has recorded AS33667 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS33667\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:       33667
             ASName:         CMCS
             ASHandle:       AS33667
             RegDate:        2005-02-16
             Updated:        2021-01-25
             Ref:            https://rdap.arin.net/registry/autnum/33667
             
             
             Comcast Cable Communications, LLC (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.
             #