Report for 33651

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.

33651 CMCS, US

  Adjacency:   136  Upstream:     2  Downstream:   134
  Upstream Adjacent AS list
    AS3356          LEVEL3, US
    AS7922          COMCAST-7922, US
  Downstream Adjacent AS list
    AS10753         LUMEN-LEGACY-L3-CUSTOMER-SHARED-USE, US
    AS11941         PWLLP-AS001, US
    AS12222         AKAMAI, US
    AS18663         UOP-AS, US
    AS18695         BMMI-WCADMIN-01, US
    AS17381         AS-WSI-ECOM-WEST, US
    AS2003          EPRI-PA, US
    AS20325         PATELCOCU, US
    AS26211         PROOFPOINT-ASN-US-WEST, US
    AS30051         SCCGOV, US
    AS2894          CALIF-DWR, US
    AS401582        --No Registry Entry--
    AS54246         AFNI-INTERNET, US
    AS55278         CIG-ASN, US
    AS5774          USPS-001, US
    AS397777        TORANI-AS, US
    AS11212         COUNTY-OF-SONOMA, US
    AS12054         ALAMEDACOUNTYDATAPROCESSING, US
    AS18556         SCIF, US
    AS19637         AVG19637, US
    AS22020         PLANETMAGPIE, US
    AS19622         GHI301PENOBSCOT, US
    AS16914         MBHARCH, US
    AS25878         QNST-DC01, US
    AS31802         COSR, US
    AS30175         EPICOR, US
    AS25632         NORTHBAYHEALTHCARECORP, US
    AS22024         SPLUNK-WEST, US
    AS394516        COUNTYOFNAPAAS, US
    AS395240        CARIAD-, US
    AS395882        POWER-SJ, US
    AS397994        XACTLY-01, US
    AS397450        COF94533, US
    AS398469        FOXTHERMAL-ASN, US
    AS46798         SSCSINC, US
    AS46341         CPUC-AS-001, US
    AS53497         WEBPERCEPTION, US
    AS400484        NMC-1441, US
    AS36838         INFOIMAGE, US
    AS54169         MGH-ION-1, US
    AS54469         COV-ISP, US
    AS54269         PROVIDENTCU, US
    AS54656         CALWATER, US
    AS11483         CONVIVA-AS, US
    AS46520         CA-DOJ, US
    AS46216         ICECONSULTING, US
    AS395210        WESTERNCARRIERS-CA, US
    AS14203         JUNIPER-NETWORKS, US
    AS26325         TECHCU-AS, US
    AS40639         KORBELINC, US
    AS18880         LAMRC, US
    AS22700         USFCA, US
    AS10780         PURE-STORAGE, US
    AS11829         CADENCE, US
    AS13511         UNIVI-2-ASN, US
    AS13843         PHOENIX-AMERICAN, US
    AS18841         TRIMBLE-SNVL, US
    AS27580         ENGINEERING-ASN1, US
    AS26758         -Reserved AS-, ZZ
    AS26476         CYBERU, US
    AS3708          PACIFIC-BIOSIENCES, US
    AS393355        SISA, US
    AS394763        CCCERA-AS, US
    AS398178        TELCION-NETOPS-01, US
    AS398572        MONOLITHICPOWER-SJC, US
    AS40620         INGENUITY-SYSTEMS, US
    AS5091          STRIPE, US
    AS40039         ALPHA-N-OMEGA-AOS-40, US
    AS33311         NET-TOPCON, US
    AS33161         CHUMASH-ENTERPRISES, US
    AS54654         MILLSCOLLEGE, US
    AS11328         BIO-RAD-ASN, US
    AS10982         TIVO-SJ, US
    AS1226          CTA-42-AS1226, US
    AS11574         -Reserved AS-, ZZ
    AS10309         MARIN-MIDAS, US
    AS14421         THERAVANCE, US
    AS17003         ZOETIS-INC, US
    AS16920         WINDRIVER, US
    AS14706         MBARI-MAIN, US
    AS14388         BRONCO-WINE, US
    AS19126         KIZAWIRELESS, US
    AS19099         RAMB, US
    AS17117         RITSNET, US
    AS20383         EXCHANGEBANK-AS, US
    AS23154         SANMINA-SCI, US
    AS22768         SYNERGYBROADBAND-MI-02, US
    AS29878         CHMP-ASN, US
    AS23472         SONICWALL-BGP, US
    AS22369         ONEMIND-01, US
    AS20066         MSC-SJ-HQ, US
    AS17035         NBCUNI-17035, US
    AS32504         INTELLETRACE, US
    AS33382         CRYPTICSTUDIOS-HQ, US
    AS32928         ITECHTOOL-ASN-LAH, US
    AS32537         XILINX, US
    AS35928         BECKMAN-COULTER-ASN, US
    AS36761         KSBW-TV, US
    AS36361         QUORA, US
    AS393518        CLAIMREMEDI-AS, US
    AS394993        SCVTA, US
    AS393305        -Reserved AS-, ZZ
    AS36776         FIVE9, US
    AS36040         YOUTUBE, US
    AS395132        MWCU, US
    AS395011        SF-PSN, US
    AS395844        LUSD, US
    AS396943        SV, US
    AS396337        DE, US
    AS397765        CCA, US
    AS400373        SKYDIO, US
    AS398732        DPCCOMMERCIAL, US
    AS4182          MLSLI-2, US
    AS40385         SAINT-MARYS-CA-AS, US
    AS397620        CITYMENLOPARK, US
    AS46186         GILD-SCI, US
    AS397258        GTRC-01, US
    AS397030        HILTON-H, US
    AS46425         SVMH-AS, US
    AS5081          CCS-AS, US
    AS5098          OPUSONE-NETS, US
    AS46864         WORKD-IT, US
    AS46305         UA-4585, US
    AS395976        COMCAST-MES, US
    AS395757        SCCFCU-PUBLIC01, US
    AS32319         AS-MARQETA, US
    AS55059         BMD, US
    AS55064         ARISTAASN1, US
    AS62508         GLOBAL-, US
    AS6099          BAE-NET-ASN, US
    AS54104         AS-STACKPATH, US
    AS6379          ALINK, US
    AS63435         MONTEREY-AS-01, US
    AS53985         DODGE-AND-COX-FUNDS, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
3013  AS33651        ORG+TRN Originate:      70912 /15.89  Transit:     208384 /14.33 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       %
12776 AS33651       CMCS, US                                          81      6      3     78      3   3.70%


  Prefix               AS Path                              Aggregation Suggestion
  5.182.186.0/24       7018 7922 33651        
  5.182.193.0/24       7018 7922 33651        
  5.182.194.0/23       7018 7922 33651      + Announce - aggregate of 5.182.194.0/24 (7018 7922 33651) and 5.182.195.0/24 (7018 7922 33651)
  5.182.194.0/24       7018 7922 33651      - Withdrawn - aggregated with 5.182.195.0/24 (7018 7922 33651)
  5.182.195.0/24       7018 7922 33651      - Withdrawn - aggregated with 5.182.194.0/24 (7018 7922 33651)
  9.142.48.0/20        7018 7922 33651        
  9.142.96.0/19        7018 7922 33651        
  24.104.72.0/24       7018 7922 33651        
  24.104.73.0/24       6939 7922 33651        
  24.104.138.0/23      2152 7922 33651        
  24.104.150.0/24      7018 7922 33651        
  36.255.215.0/24      7018 7922 33651        
  45.67.141.0/24       7018 7922 33651        
  50.145.55.0/24       7018 7922 33651        
  50.200.170.0/24      6939 7922 33651        
  50.201.8.0/23        7018 7922 33651        
  50.201.171.0/24      7018 7922 33651        
  50.204.119.0/24      6939 7922 33651        
  50.204.137.0/24      6939 7922 33651        
  50.205.226.0/24      7018 7922 33651        
  50.206.118.0/24      7018 7922 33651        
  50.206.120.0/23      7018 7922 33651        
  50.206.219.0/24      7018 7922 33651        
  50.207.182.0/24      7018 7922 33651        
  50.207.190.0/24      7018 7922 33651        
  50.207.216.0/24      7018 7922 33651        
  50.216.23.0/24       6939 7922 33651        
  50.216.212.0/24      7018 7922 33651        
  50.218.46.0/24       7018 7922 33651        
  50.219.139.0/24      7018 7922 33651        
  50.222.26.0/24       7018 7922 33651        
  50.222.50.0/24       7018 7922 33651        
  50.224.7.0/24        7018 7922 33651        
  50.227.120.0/24      7018 7922 33651        
  50.227.186.0/24      6939 7922 33651        
  50.228.12.0/24       7018 7922 33651        
  50.228.130.0/24      7018 7922 33651        
  50.229.212.0/24      7018 7922 33651        
  50.230.66.0/24       6939 7922 33651        
  50.231.143.0/24      7018 7922 33651        
  50.232.196.0/24      7018 7922 33651        
  50.233.45.0/24       7018 7922 33651        
  50.234.130.0/24      6939 7922 33651        
  50.235.20.0/23       7018 7922 33651      + Announce - aggregate of 50.235.20.0/24 (7018 7922 33651) and 50.235.21.0/24 (7018 7922 33651)
  50.235.20.0/24       7018 7922 33651      - Withdrawn - aggregated with 50.235.21.0/24 (7018 7922 33651)
  50.235.21.0/24       7018 7922 33651      - Withdrawn - aggregated with 50.235.20.0/24 (7018 7922 33651)
  50.235.233.0/24      7018 7922 33651        
  50.236.66.0/24       6939 7922 33651        
  50.239.184.0/24      7018 7922 33651        
  63.246.148.0/24      7018 7922 33651        
  63.246.152.0/24      7018 7922 33651        
  63.246.159.0/24      7018 7922 33651        
  64.84.96.0/21        7018 7922 33651        
  64.84.120.0/21       7018 7922 33651        
  64.189.18.0/24       7018 7922 33651        
  69.91.146.0/24       57866 3356 33651       
  78.31.206.0/24       7018 7922 33651        
  103.216.197.0/24     7018 7922 33651        
  107.0.21.0/24        7018 7922 33651        
  135.132.64.0/19      7018 7922 33651        
  138.226.48.0/21      7018 7922 33651        
  138.226.64.0/20      7018 7922 33651        
  138.226.112.0/21     7018 7922 33651        
  138.226.192.0/21     57866 3356 33651       
  138.226.196.0/22     2152 7922 33651        
  139.181.7.0/24       7018 7922 33651        
  139.181.26.0/24      2152 7922 33651        
  140.89.64.0/18       7018 7922 33651        
  162.218.89.0/24      7018 7922 33651        
  169.230.76.0/23      7018 7922 33651      + Announce - aggregate of 169.230.76.0/24 (7018 7922 33651) and 169.230.77.0/24 (7018 7922 33651)
  169.230.76.0/24      7018 7922 33651      - Withdrawn - aggregated with 169.230.77.0/24 (7018 7922 33651)
  169.230.77.0/24      7018 7922 33651      - Withdrawn - aggregated with 169.230.76.0/24 (7018 7922 33651)
  185.22.43.0/24       7018 7922 33651        
  185.201.41.0/24      7018 7922 33651        
  185.201.43.0/24      7018 7922 33651        
  192.70.238.0/24      2152 7922 33651        
  192.189.161.0/24     7018 7922 33651        
  192.206.19.0/24      7018 7922 33651        
  198.145.106.0/24     7018 7922 33651        
  198.202.219.0/24     7018 7922 33651        
  204.145.245.0/24     7018 7922 33651        
  209.23.201.0/24      7018 7922 33651        
  209.23.253.0/24      6939 7922 33651        
  216.170.120.0/24     7018 7922 33651        

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

AS33651   75 More Specifics   83 Total Advertisements   CMCS, US
    23.6.199.0/24                 23.0.0.0/12
    23.6.200.0/22                 23.0.0.0/12
    23.52.140.0/23                23.32.0.0/11
    23.197.50.0/23                23.192.0.0/11
    23.197.96.0/22                23.192.0.0/11
    24.104.72.0/24                24.104.0.0/17
    24.104.73.0/24                24.104.0.0/17
    24.104.138.0/23               24.104.128.0/19
    24.104.150.0/24               24.104.128.0/19
    50.175.169.0/24               50.128.0.0/9
    50.175.188.0/24               50.128.0.0/9
    50.200.135.0/24               50.128.0.0/9
    50.200.170.0/24               50.128.0.0/9
    50.201.8.0/23                 50.128.0.0/9
    50.201.44.0/22                50.128.0.0/9
    50.201.88.0/22                50.128.0.0/9
    50.201.171.0/24               50.128.0.0/9
    50.204.76.0/24                50.128.0.0/9
    50.204.119.0/24               50.128.0.0/9
    50.204.137.0/24               50.128.0.0/9
    50.206.13.0/24                50.128.0.0/9
    50.206.118.0/24               50.128.0.0/9
    50.206.120.0/23               50.128.0.0/9
    50.207.107.0/24               50.128.0.0/9
    50.207.182.0/24               50.128.0.0/9
    50.207.190.0/24               50.128.0.0/9
    50.216.23.0/24                50.128.0.0/9
    50.216.212.0/24               50.128.0.0/9
    50.217.58.0/24                50.128.0.0/9
    50.218.46.0/24                50.128.0.0/9
    50.219.139.0/24               50.128.0.0/9
    50.220.190.0/23               50.128.0.0/9
    50.222.26.0/24                50.128.0.0/9
    50.222.50.0/24                50.128.0.0/9
    50.222.102.0/24               50.128.0.0/9
    50.223.2.0/24                 50.128.0.0/9
    50.223.24.0/23                50.128.0.0/9
    50.224.201.0/24               50.128.0.0/9
    50.227.186.0/24               50.128.0.0/9
    50.228.12.0/24                50.128.0.0/9
    50.228.130.0/24               50.128.0.0/9
    50.229.125.0/24               50.128.0.0/9
    50.229.212.0/24               50.128.0.0/9
    50.230.66.0/24                50.128.0.0/9
    50.230.161.0/24               50.128.0.0/9
    50.230.208.0/24               50.128.0.0/9
    50.231.143.0/24               50.128.0.0/9
    50.232.193.0/24               50.128.0.0/9
    50.232.196.0/24               50.128.0.0/9
    50.233.45.0/24                50.128.0.0/9
    50.234.130.0/24               50.128.0.0/9
    50.234.192.0/23               50.128.0.0/9
    50.235.233.0/24               50.128.0.0/9
    50.236.66.0/24                50.128.0.0/9
    50.236.97.0/24                50.128.0.0/9
    50.236.247.0/24               50.128.0.0/9
    50.238.98.0/24                50.128.0.0/9
    50.238.133.0/24               50.128.0.0/9
    50.239.19.0/24                50.128.0.0/9
    50.239.184.0/24               50.128.0.0/9
    64.189.18.0/24                64.189.0.0/16
    104.86.192.0/19               104.64.0.0/10
    104.96.96.0/19                104.64.0.0/10
    107.0.21.0/24                 107.0.0.0/14
    107.0.26.0/24                 107.0.0.0/14
    107.1.87.0/24                 107.0.0.0/14
    107.1.195.0/24                107.0.0.0/14
    139.181.7.0/24                139.181.0.0/16
    142.131.240.0/22              142.131.0.0/16
    169.230.76.0/24               169.230.0.0/15
    169.230.77.0/24               169.230.0.0/15
    184.51.80.0/22                184.50.0.0/15
    209.23.201.0/24               209.23.192.0/18
    209.23.202.0/24               209.23.192.0/18
    209.23.253.0/24               209.23.192.0/18
    50.175.192.0/24               50.128.0.0/9
    50.175.197.0/24               50.128.0.0/9
    50.175.215.0/24               50.128.0.0/9
    50.175.229.0/24               50.128.0.0/9
    50.175.235.0/24               50.128.0.0/9
    50.235.20.0/24                50.128.0.0/9
    50.235.21.0/24                50.128.0.0/9
    50.236.209.0/24               50.128.0.0/9
    64.84.96.0/21                 64.84.96.0/19
    64.84.120.0/21                64.84.96.0/19

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

    + 23.6.199.0/24               Announced
    + 23.6.200.0/22               Announced
    + 23.52.140.0/23              Announced
    + 50.175.169.0/24             Announced
    + 50.204.76.0/24              Announced
    + 50.207.107.0/24             Announced
    + 50.222.102.0/24             Announced
    + 50.224.201.0/24             Announced
    + 50.230.208.0/24             Announced
    + 50.232.193.0/24             Announced
    + 64.189.18.0/24              Announced
    + 104.86.192.0/19             Announced
    + 107.1.87.0/24               Announced
    + 107.1.195.0/24              Announced
    + 139.181.7.0/24              Announced
    + 140.89.0.0/16               Announced
    + 142.131.240.0/22            Announced
    + 169.230.76.0/24             Announced
    + 169.230.77.0/24             Announced
    + 172.102.248.0/22            Announced
    + 192.70.238.0/24             Announced
    + 192.189.161.0/24            Announced
    + 192.206.19.0/24             Announced
    + 198.202.219.0/24            Announced
    + 204.145.245.0/24            Announced
    + 208.71.108.0/22             Announced
    - 50.175.192.0/24             Withdrawn
    - 50.175.197.0/24             Withdrawn
    - 50.175.215.0/24             Withdrawn
    - 50.175.229.0/24             Withdrawn
    - 50.175.235.0/24             Withdrawn
    - 50.235.20.0/24              Withdrawn
    - 50.235.21.0/24              Withdrawn
    - 50.236.209.0/24             Withdrawn
    - 64.84.96.0/21               Withdrawn
    - 64.84.120.0/21              Withdrawn

Bogus ASes Announced by this AS

Bogus AS		Announcing-AS
AS19099	Announced by	AS33651	CMCS - Comcast Cable Communications, LLC, US
AS26758	Announced by	AS33651	CMCS - Comcast Cable Communications, LLC, US
AS393305	Announced by	AS33651	CMCS - Comcast Cable Communications, LLC, US
AS400373	Announced by	AS33651	CMCS - Comcast Cable Communications, LLC, US

Whois Entry

whois: 402332

IANA has recorded AS33651 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS33651\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:       33651
             ASName:         CMCS
             ASHandle:       AS33651
             RegDate:        2005-02-16
             Updated:        2021-01-25
             Ref:            https://rdap.arin.net/registry/autnum/33651
             
             
             
             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
             
             
             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
             
             OrgRoutingHandle: ROUTI25-ARIN
             OrgRoutingName:   Routing
             OrgRoutingPhone:  +1-856-792-2300 
             OrgRoutingEmail:  routing@comcast.com
             OrgRoutingRef:    https://rdap.arin.net/registry/entity/ROUTI25-ARIN
             
             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
             
             
             #
             # 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.
             #