33661 CMCS, US
Adjacency: 19 Upstream: 1 Downstream: 18
Upstream Adjacent AS list
AS7922 COMCAST-7922, US
Downstream Adjacent AS list
AS396291 NCH-HEALTHCARE-SYSTEM, US
AS395659 SEAWORLD-PARKS-AND-ENTERTAINMENT, US
AS398743 NEMOURS, US
AS398641 CHCFLORG-001, US
AS395036 CITYOFSANIBEL, US
AS17035 NBCUNI-17035, US
AS30415 SCG-BGP01, US
AS396910 AS-LCPA-14, US
AS36763 WBBH, US
AS46576 LOEWS-HOTELS-ORLANDO, US
AS36040 YOUTUBE, US
AS53937 SMH-AS-NO, US
AS54119 WHITESKY-COMMUNICATIONS-2, US
AS46999 CREWSBANKCORP, US
AS6931 RINGLING, US
AS63402 UCDP-ORLCORP, US
AS63264 ACW-ASN, US
AS26876 CHICOS, US
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 29320 AS33661 ORG+TRN Originate: 1792 /21.19 Transit: 12288 /18.42 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 % 40274 AS33661 CMCS, US 7 0 0 7 0 0.00% Prefix AS Path Aggregation Suggestion 50.218.97.0/24 6939 7922 33661 50.220.33.0/24 6939 7922 33661 50.226.0.0/24 3257 7922 33661 50.227.97.0/24 3257 7922 33661 50.228.116.0/24 2914 7922 33661 50.236.155.0/24 3257 7922 33661 50.237.76.0/24 2152 7922 33661
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS33661 15 More Specifics 17 Total Advertisements CMCS, US
24.104.7.0/24 24.104.0.0/17
50.220.33.0/24 50.128.0.0/9
50.226.0.0/24 50.128.0.0/9
50.226.102.0/23 50.128.0.0/9
50.227.97.0/24 50.128.0.0/9
50.228.116.0/24 50.128.0.0/9
50.230.120.0/24 50.128.0.0/9
50.236.155.0/24 50.128.0.0/9
50.237.76.0/24 50.128.0.0/9
50.239.156.0/24 50.128.0.0/9
50.239.220.0/24 50.128.0.0/9
216.45.220.0/23 216.45.128.0/17
216.45.222.0/24 216.45.128.0/17
216.172.88.0/24 216.172.80.0/20
216.172.89.0/24 216.172.80.0/20
50.218.97.0/24 50.128.0.0/9
Prefixes added and withdrawn by this origin AS in the past 7 days.
+ 50.239.156.0/24 Announced
+ 216.172.88.0/24 Announced
+ 216.172.89.0/24 Announced
- 50.218.97.0/24 Withdrawn
whois: 402549
IANA has recorded AS33661 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS33661\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/
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# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#
ASNumber: 33661
ASName: CMCS
ASHandle: AS33661
RegDate: 2005-02-16
Updated: 2021-01-25
Ref: https://rdap.arin.net/registry/autnum/33661
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.
#