Report for 33666

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.

33666 CMCS - Comcast Cable Communications, LLC, US

  Adjacency:     5  Upstream:     1  Downstream:     4
  Upstream Adjacent AS list
    AS7922          COMCAST-7922 - Comcast Cable Communications, LLC, US
  Downstream Adjacent AS list
    AS7970          LEON-FL-SCHL - Leon County School District, US
    AS54248         GCPSNET - School Board of Gadsden County, US
    AS1830          GULF-COAST-STATE-COLLEGE - Gulf Coast State College, US
    AS13335         CLOUDFLARENET - Cloudflare, Inc., US

Announced Prefixes

Rank  AS       Type    Originate Addr Space  (pfx)   Transit Addr space  (pfx)  Description
36017 AS33666        ORG+TRN Originate:       1024 /22.00  Transit:       3328 /20.30 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       %
40488 AS33666       CMCS - Comcast Cable Communications, LLC, US       4      0      0      4      0   0.00%


  Prefix               AS Path                              Aggregation Suggestion
  66.170.177.0/24      4777 2516 7922 33666   
  66.170.179.0/24      4777 2516 7922 33666   
  199.74.174.0/24      4777 2516 7922 33666   
  199.120.255.0/24     4777 2516 7922 33666   

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

AS33666   3 More Specifics   4 Total Advertisements   CMCS - Comcast Cable Communications, LLC, US
    66.170.177.0/24               66.170.176.0/22
    66.170.179.0/24               66.170.176.0/22
    199.74.174.0/24               199.74.172.0/22

Whois Entry

whois: 402332

IANA has recorded AS33666 as originally allocated by 
/usr/bin/whois -h jwhois.apnic.netr "AS33666\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:       33666
             ASName:         CMCS
             ASHandle:       AS33666
             RegDate:        2005-02-16
             Updated:        2021-01-25
             Ref:            https://rdap.arin.net/registry/autnum/33666
             
             
             
             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.
             #