Autonomous system
AS33662 CMCS
Unclassified APNIC
Summary
Comcast
cable residential isp us
The AS handle CMCS is held by Comcast Cable Communications, LLC.
What it's used for
- The address space carries residential and commercial cable internet services, evidenced by netnames such as
CCCH3-4andCOMAST-PRIV-CUSTOMER. - With 3,840 IPv4 addresses and 98 IPv6 prefixes announced against 58 observed neighbours, the ratio indicates a regional access network rather than a transit provider.
Notable
- Registrants are predominantly Comcast Cable Communications, LLC, with one prefix registered to the City of Missouri City.
- The inventory consists of 15 IPv4 prefixes, mostly /24 blocks, alongside a larger set of IPv6 /48 prefixes.
- The network has been observed in routing tables since 2007.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 15 prefixes · 3.84K addresses IPv6 96 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 111 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS33662- Registry name
- CMCS
- Registrant
- Comcast Cable Communications, LLC
- Abuse contact
- abuse@comcast.net
- Registered
- 2005-02-16
- Last changed
- 2021-01-25
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 98% valid · 116 valid, 2 with no ROA
- ROAs
- 3,440 authorising AS33662
- ASPA
- no ASPA record
- IRR
- 2% registered · 2 of 118 announcements 7 other origin
- Route objects
- 18 naming AS33662
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 436 networks and 1,771 prefixes, as published 2026-10-13. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere