asn.dev

Autonomous system

AS22909 COMCAST-22909

Unclassified ARIN

IPv4 addresses 1.08M 215 prefixes
IPv6 prefixes 68 counted as prefixes, not addresses
Countries 1 mostly US
Exchanges 0 recorded by PCH
Upstreams 1 42 downstream
Flagged prefixes 0 none

Summary

Comcast Cable Communications

United States of America · AI-generated

residential cable isp us

The AS handle COMCAST-22909 is held by Comcast Cable Communications, LLC.

What it's used for

  • The address space carries residential cable internet and TV services, evidenced by reverse DNS entries like c-68-52-127-255.hsd1.tn.comcast.net and netnames such as KNOXVILLE-CPE-16 and NASHVILLE-17.
  • With 1,075,968 IPv4 addresses announced across 215 prefixes and only 41 observed neighbours, the high address-to-neighbour ratio indicates a large access or eyeball network rather than a transit provider.

Notable

  • Registrants are consistent with the announcer, appearing as either Comcast Cable Communications, LLC or Comcast Cable Communications, Inc.
  • The address inventory is finely subdivided into city-specific blocks (e.g., Knoxville, Nashville, Chattanooga), reflecting a site-by-site segmentation typical of a major regional cable operator.
  • The network was first seen in RIS in 2001, indicating a long-standing presence in the routing table.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

1 upstream, 42 downstream and 49 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS7922Comcast Cable Communications, LLC1,876

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 215 prefixes · 1.08M addresses IPv6 68 prefixes

CountryNamePrefixes
USUnited States of America283

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS22909
Registry name
COMCAST-22909
Registrant
Comcast Cable Communications, LLC
Abuse contact
abuse@comcast.net
Registered
2001-12-12
Last changed
2021-01-25
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 54 valid, 0 with no ROA
ROAs
2,257 authorising AS22909
ASPA
no ASPA record
IRR
0% registered · 0 of 54 announcements
Route objects
14 naming AS22909

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: 442 networks and 1,772 prefixes, as published 2026-10-15. 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

Cross-check