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AS33657

Comcast - Baltimore and D.C. (BAD)

United States (US)

ASN Information

AS NumberAS33657
AS NameCMCS
OrganizationCMCS - Comcast Cable Communications, LLC
Also known asComcast - Baltimore and D.C. (BAD)
CountryUnited States (US)
RegistryARIN
ASN TypeCable/DSL/ISP
Last Seen
Announcement Count440
IPv4 Prefix Count185
IPv6 Prefix Count255
RPKI StatusValid ×21Unknown (could not be determined) ×29
IRR RecordsView IRR route objects
WebsiteNot available

AS Path to AS33657

  1. 1351—
  2. 27552—
  3. 7922COMCAST-7922 - Comcast Cable Communications, LLC
  4. 33657Origin

Most common path, seen 5× in route collector data, latest at a collector in Eugene, OR (2026-10-21 00:54:49 UTC). Prepends collapsed.

Route Collectors (Visibility)

Eugene, OR: 1 peer session(s)
High (10+ peers)Medium (3–9)Low (1–2)

Approximate route collector locations, coloured by peer sessions carrying this AS's routes.

Announced Prefixes (440)

View All →
PrefixFamilyRPKILast Seen
23.24.96.0/19IPv4Not checkedNot looked up yet
23.25.188.0/22IPv4Not checkedNot looked up yet
23.30.0.0/19IPv4Not checkedNot looked up yet
23.31.192.0/19IPv4Not checkedNot looked up yet
24.124.152.0/23IPv4Not checkedNot looked up yet
24.124.176.0/20IPv4Not checkedNot looked up yet
24.126.0.0/17IPv4Not checkedNot looked up yet
50.76.0.0/19IPv4Not checkedNot looked up yet

Peers (130)

View All →
ASNameRelationshipPathsLast Seen
AS7922COMCAST-7922 - Comcast Cable Communications, LLCUpstream (inferred)5
AS572—Downstream (inferred)Inferred—
AS1358—Downstream (inferred)Inferred—
AS2384—Downstream (inferred)Inferred—
AS2703—Downstream (inferred)Inferred—
AS3356LEVEL3 - Level 3 Parent, LLCUpstream (inferred)Inferred—
AS3573—Downstream (inferred)Inferred—
AS3705—Downstream (inferred)Inferred—

Neighbours seen next to AS33657 in public AS paths. These are not confirmed BGP sessions; peer IP addresses and locations are not published by these sources.

Public Peering Exchange Points (0)

IX Updates →

No Internet Exchange ports are registered for AS33657.

IX ports registered by AS33657 (self-reported by the network).

Interconnection Facilities (1)

FacilityCityCountry
Digital Realty IAD (43940 Digital Loudoun)AshburnUnited States

Data centres where AS33657 says it can interconnect (self-reported).

IRR AS-SET and Peering Policy

IRR AS-SETNot available
Member of AS-SETsSee IRR page
Peering policyRestrictive
Multiple locationsNot Required
Ratio requirementYes
ContractRequired
TrafficNot available
Traffic ratioNot Disclosed
Geographic scopeRegional
Max prefixes (IPv4 / IPv6)0 / 0
Unicast / IPv6 / MulticastYes / Yes / No
Looking glassNot available
Route serverNot available

Contact Information (0)

No public contacts are registered for AS33657.

Only contacts the network has chosen to publish are shown.

Upstreams (2)

ASNameRelationshipPathsLast Seen
AS7922COMCAST-7922 - Comcast Cable Communications, LLCUpstream (inferred)5
AS3356LEVEL3 - Level 3 Parent, LLCUpstream (inferred)Inferred—

Downstreams (128)

View all →
ASNameRelationshipPathsLast Seen
AS572—Downstream (inferred)Inferred—
AS1358—Downstream (inferred)Inferred—
AS2384—Downstream (inferred)Inferred—
AS2703—Downstream (inferred)Inferred—
AS3573—Downstream (inferred)Inferred—
AS3705—Downstream (inferred)Inferred—
AS4880—Downstream (inferred)Inferred—
AS4977—Downstream (inferred)Inferred—
AS5721NDU-NET - National Defense UniversityDownstream (inferred)Inferred—
AS6092—Downstream (inferred)Inferred—
AS7820—Downstream (inferred)Inferred—
AS10440—Downstream (inferred)Inferred—

Registry and network details

Registered holderCMCS - Comcast Cable Communications, LLC
RegisteredYes
Peering policyRestrictive
IRR AS-setNot available
Registry record last modifiedNot available
MaintainersNot available
Internet exchanges0
Facilities1
Network profile updated

Data updated . See limitations.