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 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.

33651 CMCS - Comcast Cable Communications, LLC, US

  Adjacency:    84  Upstream:     1  Downstream:    83
  Upstream Adjacent AS list
    AS7922          COMCAST-7922 - Comcast Cable Communications, LLC, US
  Downstream Adjacent AS list
    AS26325         TECHCU-AS - Technology Credit Union, US
    AS46216         ICECONSULTING - Ice Consulting, US
    AS395210        WESTERNCARRIERS-CA - Western Carriers Inc., US
    AS14203         JUNIPER-NETWORKS - Juniper Networks, Inc., US
    AS393518        CLAIMREMEDI-AS - ClaimRemedi, Inc., US
    AS11328         BIO-RAD-ASN - Bio-Rad Laboratories, Inc., US
    AS10982         TIVO-SJ - TiVo, Inc., US
    AS11829         CADENCE - Cadence Design Systems, Inc., US
    AS13511         UNIVI-2-ASN - Univision Communications Inc., US
    AS1226          CTA-42-AS1226 - California Department of Technology, US
    AS11574         SFGNET-AS - San Francisco Baseball Associates LLC, US
    AS10309         MARIN-MIDAS - County of Marin, US
    AS14421         THERAVANCE - Theravance Biopharma US, LLC, US
    AS17003         ZOETIS-INC - Zoetis Inc., US
    AS16920         WINDRIVER - Wind River Systems, Inc., US
    AS14706         MBARI-MAIN - Monterey Bay Aquarium Research Institute, US
    AS14388         BRONCO-WINE - Bronco Wine Co., US
    AS19126         KIZAWIRELESS - KIZA, US
    AS19099         RAMBUS - Rambus, US
    AS18880         LAMRC - Lam Research Corporation, US
    AS18841         TRIMBLE-SNVL - Trimble, Inc., US
    AS17117         RITSNET - RITSnet, Inc., US
    AS17035         NBCUNI-17035 - NBCUniversal, US
    AS20383         EXCHANGEBANK-AS - Exchange Bank, US
    AS23154         SANMINA-SCI - Sanmina-SCI Corporation, US
    AS22768         SYNERGYBROADBAND-MI-02 - SYNERGY BROADBAND, US
    AS22700         USFCA - University of San Francisco, US
    AS23472         SONICWALL-BGP - SonicWALL, Inc., US
    AS2894          CALIF-DWR - California Department of Water Resources, US
    AS27580         ENGINEERING-ASN1 - CONVERGEONE HOLDINGS, INC., US
    AS26758         -Reserved AS-, ZZ
    AS22369         ONEMIND-01 - Cloudmylab.com, US
    AS20066         MSC-SJ-HQ - Supermicro Computer, US
    AS32504         INTELLETRACE - Intelletrace, US
    AS32928         ITECHTOOL-ASN-LAH - ITechTool Incorporated, US
    AS32537         XILINX - Xilinx Incorporated, US
    AS33382         CRYPTICSTUDIOS-HQ - CRYPTIC STUDIOS, INC., US
    AS35928         BECKMAN-COULTER-ASN - BECKMAN COULTER, INC., US
    AS36761         KSBW-TV - Hearst-Argyle Television, Inc., US
    AS36361         QUORA - Quora Inc, US
    AS3708          PACIFIC-BIOSIENCES - Pacific Biosciences of California, Inc., US
    AS393355        SISA - SAMSUNG RESEARCH AMERICA, INC., US
    AS393305        -Reserved AS-, ZZ
    AS36776         FIVE9 - Five9 Inc., US
    AS36040         YOUTUBE - Google LLC, US
    AS394993        SCVTA - Santa Clara Valley Transportation Authority, US
    AS395132        MWCU - Meriwest Credit Union, US
    AS395011        SF-PSN - City and County of San Francisco, US
    AS394763        CCCERA-AS - Contra Costa County Employees Retirement Association, US
    AS395844        LUSD - LUSD, US
    AS396943        SV - City of Sunnyvale, US
    AS397765        CCA - California College of the Arts, US
    AS397620        CITYMENLOPARK - City of Menlo Park, US
    AS398178        TELCION-NETOPS-01 - Telcion Communications Group, US
    AS397258        GTRC-01 - Graton Resort and Casino, US
    AS400373        SKYDIO - SKYDIO, INC., US
    AS398732        DPCCOMMERCIAL - Deutscher Properties Corporation, US
    AS398572        MONOLITHICPOWER-SJC - Monolithic Power Systems,Inc, US
    AS397030        HILTON-H - Hilton Worldwide Holdings Inc, US
    AS40385         SAINT-MARYS-CA-AS - Saint Marys College of California, US
    AS4182          MLSLI-2 - MLSListings inc., US
    AS40620         INGENUITY-SYSTEMS - QIAGEN Redwood City, Inc., US
    AS46186         GILD-SCI - Gilead Sciences, US
    AS46520         CA-DOJ - California Department of Justice, US
    AS5081          CCS-AS - CLARE COMPUTER SOLUTIONS, US
    AS5098          OPUSONE-NETS - Opus One Winery, LLC, US
    AS46864         WORKD-IT - Workday, Inc., US
    AS46305         UA-4585 - Universal Audio, Inc., US
    AS40039         ALPHA-N-OMEGA-AOS-40 - ALPHA AND OMEGA SEMICONDUCTOR INCORPORATED, US
    AS395976        COMCAST-MES - Comcast Cable Communications, LLC, US
    AS395757        SCCFCU-PUBLIC01 - Santa Clara County Federal Credit Union, US
    AS33311         NET-TOPCON - TOPCON POSITIONING SYSTEMS INC, US
    AS33161         CHUMASH-ENTERPRISES - Chumash Casino Resort, US
    AS32319         AS-MARQETA - Marqeta, Inc., US
    AS55059         MPP - Microwave Power Products, Inc., US
    AS55064         ARISTAASN1 - Arista Networks, Inc., US
    AS54654         MILLSCOLLEGE - Mills College, US
    AS62508         GLOBAL-US - GlobalLogic Inc., US
    AS6099          BAE-NET-ASN - Alameda County Office of Education, US
    AS54104         INFOO-54104 - InfoObjects Inc., US
    AS6379          ALINK - A-Link Network Services, Inc., US
    AS63435         MONTEREY-AS-01 - County of Monterey, US
    AS53985         DODGE-AND-COX-FUNDS - DODGE & COX, US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
2881  AS33651        ORG+TRN Originate:      74240 /15.82  Transit:     314880 /13.74 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       %
 8711 AS33651       CMCS - Comcast Cable Communications, LLC, US      87     10      5     82      5   5.75%


  Prefix               AS Path                              Aggregation Suggestion
  5.182.186.0/24       4777 2516 7922 33651   
  5.182.193.0/24       4777 2516 7922 33651   
  5.182.194.0/23       4777 2516 7922 33651 + Announce - aggregate of 5.182.194.0/24 (4777 2516 7922 33651) and 5.182.195.0/24 (4777 2516 7922 33651)
  5.182.194.0/24       4777 2516 7922 33651 - Withdrawn - aggregated with 5.182.195.0/24 (4777 2516 7922 33651)
  5.182.195.0/24       4777 2516 7922 33651 - Withdrawn - aggregated with 5.182.194.0/24 (4777 2516 7922 33651)
  9.142.48.0/20        4777 2516 7922 33651   
  9.142.96.0/19        4777 2516 7922 33651   
  24.104.72.0/23       4777 2516 7922 33651 + Announce - aggregate of 24.104.72.0/24 (4777 2516 7922 33651) and 24.104.73.0/24 (4777 2516 7922 33651)
  24.104.72.0/24       4777 2516 7922 33651 - Withdrawn - aggregated with 24.104.73.0/24 (4777 2516 7922 33651)
  24.104.73.0/24       4777 2516 7922 33651 - Withdrawn - aggregated with 24.104.72.0/24 (4777 2516 7922 33651)
  24.104.138.0/23      4777 2516 7922 33651   
  24.104.150.0/24      4777 2516 7922 33651   
  36.255.215.0/24      4777 2516 7922 33651   
  45.58.232.0/21       4777 2516 7922 33651   
  45.67.141.0/24       4777 2516 7922 33651   
  50.145.55.0/24       4777 2516 7922 33651   
  50.200.170.0/24      4777 2516 7922 33651   
  50.201.8.0/23        4777 2516 7922 33651   
  50.201.171.0/24      4777 2516 7922 33651   
  50.204.119.0/24      4777 2516 7922 33651   
  50.204.137.0/24      4777 2516 7922 33651   
  50.205.226.0/24      4777 2516 7922 33651   
  50.206.118.0/24      4777 2516 7922 33651   
  50.206.120.0/23      4777 2516 7922 33651   
  50.206.219.0/24      4777 2516 7922 33651   
  50.207.182.0/24      4777 2516 7922 33651   
  50.207.190.0/24      4777 2516 7922 33651   
  50.207.216.0/24      4777 2516 7922 33651   
  50.216.23.0/24       4777 2516 7922 33651   
  50.216.212.0/24      4777 2516 7922 33651   
  50.218.46.0/24       4777 2516 7922 33651   
  50.219.139.0/24      4777 2516 7922 33651   
  50.222.26.0/24       4777 2516 7922 33651   
  50.222.50.0/24       4777 2516 7922 33651   
  50.224.7.0/24        4777 2516 7922 33651   
  50.227.120.0/24      4777 2516 7922 33651   
  50.227.186.0/24      4777 2516 7922 33651   
  50.228.12.0/24       4777 2516 7922 33651   
  50.228.130.0/24      4777 2516 7922 33651   
  50.228.223.0/24      4777 2516 7922 33651   
  50.229.212.0/24      4777 2516 7922 33651   
  50.230.66.0/24       4777 2516 7922 33651   
  50.231.143.0/24      4777 2516 7922 33651   
  50.232.196.0/24      4777 2516 7922 33651   
  50.233.45.0/24       4777 2516 7922 33651   
  50.234.130.0/24      4777 2516 7922 33651   
  50.235.20.0/23       4777 2516 7922 33651 + Announce - aggregate of 50.235.20.0/24 (4777 2516 7922 33651) and 50.235.21.0/24 (4777 2516 7922 33651)
  50.235.20.0/24       4777 2516 7922 33651 - Withdrawn - aggregated with 50.235.21.0/24 (4777 2516 7922 33651)
  50.235.21.0/24       4777 2516 7922 33651 - Withdrawn - aggregated with 50.235.20.0/24 (4777 2516 7922 33651)
  50.235.233.0/24      4777 2516 7922 33651   
  50.236.66.0/24       4777 2516 7922 33651   
  50.239.184.0/24      4777 2516 7922 33651   
  63.246.148.0/24      4777 2516 7922 33651   
  63.246.152.0/24      4777 2516 7922 33651   
  63.246.159.0/24      4777 2516 7922 33651   
  64.84.96.0/21        4777 2516 7922 33651   
  64.84.120.0/21       4777 2516 7922 33651   
  64.189.18.0/24       4777 2516 7922 33651   
  69.91.146.0/24       4777 2516 7922 33651   
  78.31.206.0/24       4777 2516 7922 33651   
  103.111.63.0/24      4777 2516 7922 33651   
  103.216.197.0/24     4777 2516 7922 33651   
  107.0.21.0/24        4777 2516 7922 33651   
  135.132.64.0/19      4777 2516 7922 33651   
  138.226.48.0/21      4777 2516 7922 33651   
  138.226.64.0/20      4777 2516 7922 33651   
  138.226.112.0/21     4777 2516 7922 33651   
  138.226.192.0/21     4777 2516 7922 33651   
  139.181.7.0/24       4777 2516 7922 33651   
  139.181.26.0/24      4777 2516 7922 33651   
  140.89.64.0/18       4777 2516 7922 33651   
  162.218.89.0/24      4777 2516 7922 33651   
  169.230.76.0/23      4777 2516 7922 33651 + Announce - aggregate of 169.230.76.0/24 (4777 2516 7922 33651) and 169.230.77.0/24 (4777 2516 7922 33651)
  169.230.76.0/24      4777 2516 7922 33651 - Withdrawn - aggregated with 169.230.77.0/24 (4777 2516 7922 33651)
  169.230.77.0/24      4777 2516 7922 33651 - Withdrawn - aggregated with 169.230.76.0/24 (4777 2516 7922 33651)
  185.22.43.0/24       4777 2516 7922 33651   
  185.201.41.0/24      4777 2516 7922 33651   
  185.201.43.0/24      4777 2516 7922 33651   
  192.70.238.0/24      4777 2516 7922 33651   
  192.189.161.0/24     4777 2516 7922 33651   
  192.206.19.0/24      4777 2516 7922 33651   
  198.145.106.0/24     4777 2516 7922 33651   
  198.145.136.0/22     4777 2516 7922 33651   
  198.145.141.0/24     4777 2516 7922 33651   
  198.145.142.0/23     4777 2516 7922 33651 + Announce - aggregate of 198.145.142.0/24 (4777 2516 7922 33651) and 198.145.143.0/24 (4777 2516 7922 33651)
  198.145.142.0/24     4777 2516 7922 33651 - Withdrawn - aggregated with 198.145.143.0/24 (4777 2516 7922 33651)
  198.145.143.0/24     4777 2516 7922 33651 - Withdrawn - aggregated with 198.145.142.0/24 (4777 2516 7922 33651)
  198.202.219.0/24     4777 2516 7922 33651   
  204.145.245.0/24     4777 2516 7922 33651   
  209.23.201.0/24      4777 2516 7922 33651   
  209.23.253.0/24      4777 2516 7922 33651   
  216.170.120.0/24     4777 2516 7922 33651   

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

AS33651   80 More Specifics   87 Total Advertisements   CMCS - Comcast Cable Communications, LLC, US
    5.182.186.0/24                5.182.184.0/22
    5.182.193.0/24                5.182.192.0/22
    5.182.194.0/24                5.182.192.0/22
    5.182.195.0/24                5.182.192.0/22
    9.142.48.0/20                 9.142.0.0/16
    9.142.96.0/19                 9.142.0.0/16
    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
    36.255.215.0/24               36.255.212.0/22
    45.58.232.0/21                45.58.192.0/18
    45.67.141.0/24                45.67.140.0/22
    50.145.55.0/24                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
    50.201.171.0/24               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
    50.205.226.0/24               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
    50.206.219.0/24               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
    50.207.216.0/24               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
    50.218.46.0/24                50.128.0.0/9
    50.219.139.0/24               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
    50.224.7.0/24                 50.128.0.0/9
    50.227.120.0/24               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
    50.228.223.0/24               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
    50.231.143.0/24               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
    50.235.20.0/24                50.128.0.0/9
    50.235.21.0/24                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
    50.239.184.0/24               50.128.0.0/9
    63.246.148.0/24               63.246.144.0/21
    63.246.159.0/24               63.246.156.0/22
    64.84.96.0/21                 64.84.96.0/19
    64.84.120.0/21                64.84.96.0/19
    64.189.18.0/24                64.189.0.0/16
    69.91.146.0/24                69.91.128.0/18
    78.31.206.0/24                78.31.204.0/22
    103.111.63.0/24               103.111.60.0/22
    103.216.197.0/24              103.216.196.0/22
    107.0.21.0/24                 107.0.0.0/14
    135.132.64.0/19               135.132.64.0/18
    138.226.48.0/21               138.226.0.0/17
    138.226.64.0/20               138.226.0.0/17
    138.226.112.0/21              138.226.0.0/17
    138.226.192.0/21              138.226.192.0/20
    139.181.7.0/24                139.181.0.0/16
    139.181.26.0/24               139.181.0.0/16
    140.89.64.0/18                140.89.0.0/16
    162.218.89.0/24               162.218.88.0/21
    169.230.76.0/24               169.230.0.0/15
    169.230.77.0/24               169.230.0.0/15
    185.22.43.0/24                185.22.40.0/22
    185.201.41.0/24               185.201.40.0/22
    185.201.43.0/24               185.201.40.0/22
    198.145.106.0/24              198.145.96.0/20
    198.145.136.0/22              198.145.128.0/19
    198.145.141.0/24              198.145.128.0/19
    198.145.142.0/24              198.145.128.0/19
    198.145.143.0/24              198.145.128.0/19
    209.23.201.0/24               209.23.192.0/18
    209.23.253.0/24               209.23.192.0/18

Bogus ASes Announced by this AS

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