asn.dev

Autonomous system

AS23411 -Reserved AS-

Unclassified ARIN

IPv4 addresses 256 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly Unknown
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Comcast Cable Communications, LLC

AI-generated

cable residential business

The AS handle is -Reserved AS- and the holder is Comcast Cable Communications, LLC.

What it's used for

  • The space carries cable customer infrastructure, evidenced by the netname CCCH3-4 and registrant Comcast Cable Communications, LLC.
  • The inventory consists of 256 IPv4 addresses within a single prefix, 50.203.163.0/24, with 0 IPv6 prefixes announced.
  • With 1 observed neighbour, the routing footprint is minimal, consistent with a small, isolated segment of a larger cable network rather than a transit provider.

Notable

  • The registrant Comcast Cable Communications, LLC aligns with the expected identity of the operator for this address space.
  • The address inventory is a single /24 block, representing a small, specific allocation within the broader Comcast estate.

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, 0 downstream and 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS33667Comcast Cable Communications, LLC57

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, 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 1 prefixes · 256 addresses IPv6 0 prefixes

CountryNamePrefixes
Unknown1

Registry

Allocation record

ARIN · via Atlas (registry data)
Registry
ARIN
Allocation
reserved

Routing security

RPKI and IRR

Full detail
RPKI
100% valid · 1 valid, 0 with no ROA
ROAs
1 authorising AS23411
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
14 naming AS23411

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 1,782 prefixes, as published 2026-10-16. 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