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 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.

33668 CMCS, US

  Adjacency:    67  Upstream:     2  Downstream:    65
  Upstream Adjacent AS list
    AS3356          LEVEL3, US
    AS7922          COMCAST-7922, US
  Downstream Adjacent AS list
    AS15099         MONROE-COUNTY-MI-PUBLIC-ASN, US
    AS394004        HURLEY-MEDICAL-ASN, US
    AS62611         CEC-AS-NB-4080, US
    AS13683         AUTO-WARES-ASN, US
    AS19031         WESCO, US
    AS19224         QSGIT, US
    AS13335         CLOUDFLARENET, US
    AS31923         THE-AUTO-CLUB-GROUP-ASN-1, US
    AS32477         ONLINE-TECH-LLC2, US
    AS395551        CARHA-ASN, US
    AS397288        MCREY, US
    AS40262         PANTONE-AS, US
    AS21970         PCESYSTEMS, US
    AS33145         ASN-BETHANYBCS, US
    AS54946         MH105-METRO-HEALTH-HOSPITAL, US
    AS1438          PIONEER-STATE-MUTUAL-INSURANCE, US
    AS393663        ACUMENT, US
    AS396332        S1-FLINT-DC, US
    AS393471        FOS-HOSTING, US
    AS393673        JDL-AS-1, US
    AS394446        NCATS, US
    AS36127         MCPS, US
    AS54267         LAKE-TRUST-CREDIT-UNION-MULTIHOME-AS-0001, US
    AS400315        COLD-HEADING, US
    AS395234        ANESTHESIALLC, US
    AS397969        CL-ASN-01, US
    AS396911        DPLO-411SSFLT, US
    AS395779        ARMINTL, US
    AS14010         JACKHENRY, US
    AS13325         STOMI, US
    AS19277         IMAGEMASTER-01, US
    AS393499        ONLINE-TECH-LLC3, US
    AS395614        COL, US
    AS53352         HFHS-ASN, US
    AS10351         ENERT, US
    AS11115         ONLINE-TECH-LLC, US
    AS12088         NABANCARD, US
    AS16758         RICOH USA, US
    AS19880         REALCOMPII, US
    AS17003         ZOETIS-INC, US
    AS14842         BAUD-AS01, US
    AS14257         EZ-NET, US
    AS23032         FCS-INDUSTRIES-01, US
    AS26510         FTCH-HQ-ASN, US
    AS26463         MISD-NET, US
    AS33372         SPARTAN-AS, US
    AS35928         BECKMAN-COULTER-ASN, US
    AS394890        DEW-AS, US
    AS394729        NPIASN, US
    AS393376        DYNAMICEDGE, US
    AS393256        DTE-ASN, US
    AS395594        CONSUMERSENERGYCO-ASN, US
    AS397367        CRANBROOK-01, US
    AS398856        WPP-DETROIT, US
    AS399293        HOLASN, US
    AS397871        COD-PUBLIC-148, US
    AS401285        MICHIGANVIRTUAL, US
    AS4208          THE-ISERV-COMPANY, US
    AS46674         PUB-ASN, US
    AS39987         KISD-ORG, US
    AS53775         -Reserved AS-, ZZ
    AS396224        NSF-INTERNATIONAL, US
    AS36040         YOUTUBE, US
    AS32285         HFCC, US
    AS62658         WYAN-AS, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
13085 AS33668        ORG+TRN Originate:       6912 /19.25  Transit:     185088 /14.50 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       %
40278 AS33668       CMCS, US                                          27      0      0     27      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  50.202.125.0/24      3257 7922 33668        
  50.203.250.0/24      3257 7922 33668        
  50.204.170.0/24      3257 7922 33668        
  50.206.127.0/24      3257 7922 33668        
  50.207.92.0/24       6939 7922 33668        
  50.217.249.0/24      6939 7922 33668        
  50.220.170.0/24      6939 7922 33668        
  50.221.158.0/24      3257 7922 33668        
  50.223.155.0/24      3257 7922 33668        
  50.226.70.0/24       3257 7922 33668        
  50.227.241.0/24      6939 7922 33668        
  50.228.137.0/24      3257 7922 33668        
  50.229.7.0/24        3257 7922 33668        
  50.232.15.0/24       3257 7922 33668        
  50.233.62.0/24       3257 7922 33668        
  50.233.114.0/24      6939 7922 33668        
  50.238.250.0/24      6939 7922 33668        
  50.239.133.0/24      6939 7922 33668        
  107.0.213.0/24       3257 7922 33668        
  157.240.130.0/24     6939 7922 33668        
  157.240.135.0/24     6939 7922 33668        
  192.88.105.0/24      7018 7922 33668        
  192.138.205.0/24     7018 7922 33668        
  198.180.251.0/24     7018 7922 33668        
  198.199.172.0/24     6939 7922 33668        
  206.201.156.0/24     7018 7922 33668        
  206.201.158.0/24     7018 7922 33668        

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

AS33668   27 More Specifics   31 Total Advertisements   CMCS, US
    50.202.42.0/24                50.128.0.0/9
    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
    50.216.168.0/24               50.128.0.0/9
    50.217.249.0/24               50.128.0.0/9
    50.220.82.0/24                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
    50.236.82.0/24                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
    192.64.18.0/24                192.64.18.0/23
    206.201.156.0/24              206.201.144.0/20
    206.201.158.0/24              206.201.144.0/20
    50.173.173.0/24               50.128.0.0/9
    50.218.135.0/24               50.128.0.0/9

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

    + 50.220.82.0/24              Announced
    - 50.173.173.0/24             Withdrawn
    - 50.218.135.0/24             Withdrawn
    - 192.88.105.0/24             Withdrawn

Whois Entry

whois: 402549

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.
             #