asn.dev

Autonomous system

AS23087 CDG

Unclassified APNIC

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

Summary

Communications Data Group

United States of America · AI-generated

business telecom oss-bss

The AS handle CDG is held by Communications Data Group.

What it's used for

  • The address space carries a single /24 block with the netname ATT and registrant AT&T Enterprises, LLC, indicating legacy or leased infrastructure space.
  • The AS announces 256 IPv4 addresses across 1 prefix and maintains 1 observed neighbour, a ratio consistent with a small, isolated business or internal network rather than a transit provider.

Notable

  • The RDAP registrant AT&T Enterprises, LLC differs from the AS holder Communications Data Group, suggesting the address space is leased or was acquired from AT&T.
  • Communications Data Group is a provider of OSS/BSS software for telecommunications carriers, and this AS likely supports its internal operations or specific client deployments.
  • The inventory consists of a single contiguous IPv4 block with no IPv6 prefixes announced.

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
AS18671PRTC58

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-23, 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
USUnited States of America1

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS23087
Registry name
CDG
Registrant
Communications Data Group
Abuse contact
mikem@cdg.ws
Registered
2002-01-17
Last changed
2015-11-09
Allocation
assigned

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS23087
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS23087

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 1,779 prefixes, as published 2026-10-24. 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