Autonomous system profile

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

AS33657

Announcement observedARIN

CMCS - Comcast Cable Communications, LLC · CMCS

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

Last active10/22/2026, 16:56:17Snapshot expired

View network topology RDAP registration

ASN: AS33657
Registration country: United States
Name: CMCS - 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
107.1.101.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
192.110.220.0/23BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
192.189.235.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
208.87.105.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.201.252.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.202.117.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.202.155.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.203.251.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.204.116.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.204.128.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.205.74.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.207.162.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.216.214.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.218.16.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 08:00:00	10/9/2026, 16:00:00	✓	×	Historical record
50.219.87.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.223.158.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.223.159.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.224.212.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.226.61.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/20/2026, 08:00:00	10/9/2026, 16:00:00	✓	×	Historical record
50.232.109.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.232.173.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.232.184.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.235.236.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.235.98.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.236.234.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.236.38.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
50.238.163.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid
69.67.80.0/20BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 00:00:00	✓	×	Currently valid
76.78.2.0/24BGP · IPv4	Announced prefixBGP route observation	Not applicable · BGP prefix	9/18/2026, 08:00:00	10/22/2026, 08:00:00	✓	×	Currently valid

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

Registration and sources

Organization: CMCS - 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

10/22/2026, 16:56:1729 v4245 v62 Upstream · 0 Uncertain

10/18/2026, 17:16:5429 v4245 v63 Upstream · 0 Uncertain

10/10/2026, 19:45:1329 v4245 v62 Upstream · 0 Uncertain

10/5/2026, 09:05:3329 v4247 v62 Upstream · 0 Uncertain

10/2/2026, 16:02:3329 v4247 v62 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 · rir-rdap-asn · iana-rdap-asn-bootstrap