Report for 33668

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.

33668 CMCS - Comcast Cable Communications, LLC, US

  Adjacency:    42  Upstream:     1  Downstream:    41
  Upstream Adjacent AS list
    AS7922          COMCAST-7922 - Comcast Cable Communications, LLC, US
  Downstream Adjacent AS list
    AS21970         PCESYSTEMS - PCE Systems, US
    AS395614        COL - City of Lansing, US
    AS54946         MH105-METRO-HEALTH-HOSPITAL - Metro Health, US
    AS10351         ENERT - Enertron L.L.C., US
    AS12088         NABANCARD - North American Bancard, LLC, US
    AS13325         STOMI - Michigan State Government, US
    AS14842         BAUD-AS01 - Baudville, Inc., US
    AS14257         EZ-NET - The Iserv Company, LLC, US
    AS11115         ONLINE-TECH-LLC - Otava, LLC, US
    AS16758         RICOH USA - Ricoh USA, Inc., US
    AS19880         REALCOMPII - REALCOMP II LTD., US
    AS17003         ZOETIS-INC - Zoetis Inc., US
    AS23032         FCS-INDUSTRIES-01 - FCS Industries, US
    AS26510         FTCH-HQ-ASN - Fishbeck, Thompson, Carr & Huber, Inc., US
    AS26463         MISD-NET - Macomb Intermediate School District, US
    AS15099         MONROE-COUNTY-MI-PUBLIC-ASN - County of Monroe, US
    AS33372         SPARTAN-AS - Spartan Stores Inc., US
    AS35928         BECKMAN-COULTER-ASN - BECKMAN COULTER, INC., US
    AS32477         ONLINE-TECH-LLC2 - Otava, LLC, US
    AS393376        DYNAMICEDGE - Dynamic Edge, Inc., US
    AS393256        DTE-ASN - DTE Energy Company, US
    AS394890        DEW-AS - Dewpoint Inc, US
    AS394729        NPIASN - NeoPollard Interactive LLC, US
    AS394004        HURLEY-MEDICAL-ASN - Hurley Medical Center, US
    AS393499        ONLINE-TECH-LLC3 - Otava, LLC, US
    AS36040         YOUTUBE - Google LLC, US
    AS397367        CRANBROOK-01 - Cranbrook Educational Community, US
    AS397871        COD-PUBLIC-148 - City Of Detroit, US
    AS398856        WPP-DETROIT - Group M Worldwide, LLC, US
    AS399293        HOLASN - Hollingsworth Logistics Group LLC, US
    AS397969        CL-ASN-01 - Cambium Learning, Inc., US
    AS401285        MICHIGANVIRTUAL - MICHIGAN VIRTUAL, US
    AS4208          THE-ISERV-COMPANY - The Iserv Company, LLC, US
    AS53352         HFHS-ASN - Henry Ford Health System, US
    AS46674         PUB-ASN - City of Grand Rapids, US
    AS39987         KISD-ORG - Kent Intermediate School District, US
    AS53775         SEKISUI KYDEX - Sekisui KYDEX, LLC, US
    AS396224        NSF-INTERNATIONAL - NSF International, US
    AS395779        ARMINTL - ARMSTRONG INTERNATIONAL INC, US
    AS32285         HFCC - Henry Ford College, US
    AS62658         WYAN-AS - City of Wyandotte, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
12948 AS33668        ORG+TRN Originate:       6912 /19.25  Transit:     190976 /14.46 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       %
39849 AS33668       CMCS - Comcast Cable Communications, LLC, US      27      0      0     27      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  50.202.125.0/24      4777 2516 7922 33668   
  50.203.250.0/24      4777 2516 7922 33668   
  50.204.170.0/24      4777 2516 7922 33668   
  50.206.127.0/24      4777 2516 7922 33668   
  50.207.92.0/24       4777 2516 7922 33668   
  50.217.249.0/24      4777 2516 7922 33668   
  50.220.170.0/24      4777 2516 7922 33668   
  50.221.158.0/24      4777 2516 7922 33668   
  50.223.155.0/24      4777 2516 7922 33668   
  50.226.70.0/24       4777 2516 7922 33668   
  50.227.241.0/24      4777 2516 7922 33668   
  50.228.137.0/24      4777 2516 7922 33668   
  50.229.7.0/24        4777 2516 7922 33668   
  50.232.15.0/24       4777 2516 7922 33668   
  50.233.62.0/24       4777 2516 7922 33668   
  50.233.114.0/24      4777 2516 7922 33668   
  50.238.250.0/24      4777 2516 7922 33668   
  50.239.133.0/24      4777 2516 7922 33668   
  107.0.213.0/24       4777 2516 7922 33668   
  157.240.130.0/24     4777 2516 7922 33668   
  157.240.135.0/24     4777 2516 7922 33668   
  192.88.105.0/24      4777 2516 7922 33668   
  192.138.205.0/24     4777 2516 7922 33668   
  198.180.251.0/24     4777 2516 7922 33668   
  198.199.172.0/24     4777 2516 7922 33668   
  206.201.156.0/24     4777 2516 7922 33668   
  206.201.158.0/24     4777 2516 7922 33668   

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

AS33668   23 More Specifics   27 Total Advertisements   CMCS - Comcast Cable Communications, LLC, US
    50.202.125.0/24               50.128.0.0/9
    50.203.250.0/24               50.128.0.0/9
    50.204.170.0/24               50.128.0.0/9
    50.206.127.0/24               50.128.0.0/9
    50.207.92.0/24                50.128.0.0/9
    50.217.249.0/24               50.128.0.0/9
    50.220.170.0/24               50.128.0.0/9
    50.221.158.0/24               50.128.0.0/9
    50.223.155.0/24               50.128.0.0/9
    50.226.70.0/24                50.128.0.0/9
    50.227.241.0/24               50.128.0.0/9
    50.228.137.0/24               50.128.0.0/9
    50.229.7.0/24                 50.128.0.0/9
    50.232.15.0/24                50.128.0.0/9
    50.233.62.0/24                50.128.0.0/9
    50.233.114.0/24               50.128.0.0/9
    50.238.250.0/24               50.128.0.0/9
    50.239.133.0/24               50.128.0.0/9
    107.0.213.0/24                107.0.0.0/14
    157.240.130.0/24              157.240.0.0/16
    157.240.135.0/24              157.240.0.0/16
    206.201.156.0/24              206.201.144.0/20
    206.201.158.0/24              206.201.144.0/20

Whois Entry

whois: 402599

IANA has recorded AS33668 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS33668\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:       33668
             ASName:         CMCS
             ASHandle:       AS33668
             RegDate:        2005-02-16
             Updated:        2021-01-25
             Ref:            https://rdap.arin.net/registry/autnum/33668
             
             
             
             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.
             #