Autonomous system profile

Review registration details, announced prefixes, network relationships and historical snapshots.

AS33655

Announcement observedARIN

Comcast Cable Communications, LLC · CMCS

This profile is assembled from CHA.LA's normalized registration, routing and observation snapshots.

Last active10/2/2026, 16:02:26Snapshot expired

View network topology RDAP registration

ASN: AS33655
Registration country: United States
Name: Comcast Cable Communications, LLC
Abbreviation: CMCS
Registration date: 2/16/2005, 19:59:31
Status: Announcement observed
RIR: ARIN

Network relationships and announced prefixes

ASN / prefix	Description / organization	Geographic scope	First seen	Last active	IPv4	IPv6	Status
2001:559:13f::/48BGP · IPv6	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/8/2026, 08:00:00	×	✓	Historical record
2001:559:4d8::/48BGP · IPv6	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/8/2026, 08:00:00	×	✓	Historical record
2001:559:518::/48BGP · IPv6	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/8/2026, 08:00:00	×	✓	Historical record
2001:559:83ff::/48BGP · IPv6	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/8/2026, 08:00:00	×	✓	Historical record
2001:559:8689::/48BGP · IPv6	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/8/2026, 08:00:00	×	✓	Historical record
2001:559:c3f7::/48BGP · IPv6	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/8/2026, 08:00:00	×	✓	Historical record
2001:559:c4ec::/48BGP · IPv6	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/8/2026, 08:00:00	×	✓	Historical record

BGP prefixes have no geographic country; the column is marked not applicable.

Registration and sources

Organization: Comcast Cable Communications, LLC
RIR: ARIN
Registration country: United States
Registration date: 2/16/2005, 19:59:31
Abuse contact: abuse@comcast.net

Snapshot trend

10/2/2026, 16:02:260 v47 v61 Upstream · 0 Uncertain

ASN route snapshotThis page reads collected ASN, prefix, relationship and history data. External interfaces are used for initial collection and scheduled refreshes.Source keys: cha-la-external-routing · iana-rdap-asn-bootstrap · rir-rdap-asn