Home ASN LookupAS33661

AS33661 CMCS - Comcast Cable Communications, LLC

🇺🇸

ARINassigned

Announced Prefixes (BGP)

216total

173 IPv443 IPv6

IPv4 Addresses

Allocated (RIR)0

Announced (BGP)630,528

IPv6 Addresses

Allocated (RIR)0

Announced (BGP)3×10³¹

Prefix Limit (IPv4)

500

Prefix Limit (IPv6)

200

Country

🇺🇸 US

RIR

ARIN

Status

assigned

Allocated

2005-02-16

Announced Prefixes

(BGP)216

Prefix	RPKI	IRR	Last Seen
23.31.176.0/20	Valid	-	2026-10-11
24.124.134.0/23	Valid	-	2026-10-11
50.78.212.0/22	Valid	-	2026-10-11
50.79.216.0/22	Valid	-	2026-10-11
50.184.164.0/22	Valid	-	2026-10-11
50.185.48.0/21	Valid	-	2026-10-11
50.191.0.0/20	Valid	ARIN	2026-10-11
50.192.16.0/20	Valid	-	2026-10-11
50.192.208.0/21	Valid	-	2026-10-11
50.194.212.0/22	Valid	-	2026-10-11

1-10 of 216

1 / 22

All 216 announced prefixes of AS33661 →

BGP Neighbours

(seen in AS paths)

Upstreams (1)

Networks AS33661 hands its own prefixes to: transit providers, or peers at an exchange.

AS7922Comcast Cable Communications216

Downstreams (16)

Networks whose own prefixes AS33661 passes on: usually its customers.

AS46576Loews Hotels At Universal Orlando9
AS63402Universal Orlando8
AS17035NBCUniversal2
AS26876Chico'S Fas2
AS46999Crews Banking Corporation2
AS54113Fastly2
AS63264Alternative Choice Wireless2
AS6931Ringling College Of Art And Design1
AS30415Sarasota County Government1
AS36040Google1
AS36763Hearst Argyle Television1
AS54119WhiteSky Communications1
AS395659SeaWorld Parks & Entertainment1
AS398641Community Health Centers1
AS398743The Nemours Foundation1
AS401671ACCESSPARKS1

Transfer History

Registry transfers of AS33661 between organisations.

AS33661M&A · 2016-08-31
Comcast Cable Communications, Inc.
🇺🇸 US ARIN
→
Comcast Cable Communications, LLC
🇺🇸 US ARIN

Date	Resource	From	To	Type
2016-08-31	AS33661	Comcast Cable Communications, Inc. 🇺🇸 US ARIN	Comcast Cable Communications, LLC 🇺🇸 US ARIN	M&A

ASPA

No ASPA

External Links

ARIN Whois RIPEstat

Learn more

What is an ASN?Autonomous systems, ASN ranges and how they are assigned
RPKI and route origin validationWhat the RPKI badges on the prefix list mean
ASPA explainedWhy AS33661 should publish an ASPA object
IPv4 transfers in the ARIN regionMonthly volume and the latest registry transfers
ASN data in AI agents and SIEMMCP server and API integrations

API

Open

GEThttps://api.ipctl.io/v1/asn/33661

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/33661" | jq