Home ASN LookupAS33656

AS33656 CMCS - Comcast Cable Communications, LLC

🇺🇸

ARINassigned

Announced Prefixes (BGP)

62total

49 IPv413 IPv6

IPv4 Addresses

Allocated (RIR)0

Announced (BGP)165,632

IPv6 Addresses

Allocated (RIR)0

Announced (BGP)1×10³¹

Prefix Limit (IPv4)

100

Prefix Limit (IPv6)

Country

🇺🇸 US

RIR

ARIN

Status

assigned

Allocated

2005-02-16

Announced Prefixes

(BGP)62

Prefix	RPKI	IRR	Last Seen
23.30.204.0/23	Valid	-	2026-10-11
23.31.124.0/22	Valid	-	2026-10-11
50.77.6.0/23	Valid	-	2026-10-11
50.193.228.0/22	Valid	-	2026-10-11
50.214.80.0/21	Valid	-	2026-10-11
50.242.144.0/22	Valid	-	2026-10-11
50.245.84.0/22	Valid	-	2026-10-11
50.251.16.0/22	Valid	-	2026-10-11
50.254.220.0/22	Valid	-	2026-10-11
67.162.192.0/20	Valid	Other IRR	2026-10-11

1-10 of 62

1 / 7

All 62 announced prefixes of AS33656 →

BGP Neighbours

(seen in AS paths)

Upstreams (1)

Networks AS33656 hands its own prefixes to: transit providers, or peers at an exchange.

AS7922Comcast Cable Communications62

Downstreams (1)

Networks whose own prefixes AS33656 passes on: usually its customers.

AS398111Maverick Transportation1

Transfer History

Registry transfers of AS33656 between organisations.

AS33656M&A · 2016-08-31
Comcast Cable Communications, Inc.
🇺🇸 US ARIN
→
Comcast Cable Communications, LLC
🇺🇸 US ARIN

Date	Resource	From	To	Type
2016-08-31	AS33656	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 AS33656 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/33656

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

curl -s "https://api.ipctl.io/v1/asn/33656" | jq