asn.dev

Autonomous system

AS203652 IBMUK

Unclassified APNIC

IPv4 addresses 512 2 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly GB
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

IBM United Kingdom Limited

United Kingdom · AI-generated

business corporate ibm uk

The AS handle IBMUK is held by IBM United Kingdom Limited.

What it's used for

  • The address space carries corporate infrastructure, evidenced by the netname IBM-UK-LTD and registrant IBM United Kingdom Limited for both announced prefixes.
  • The AS announces 512 IPv4 addresses across 2 prefixes and maintains 1 observed neighbour, indicating a small, self-contained corporate estate rather than a transit or access network.
  • Traffic from this AS consists of internal corporate endpoints, office workers, and business applications associated with IBM's UK operations.

Notable

  • Registrants agree with the announcer, with both prefixes registered to IBM United Kingdom Limited.
  • The address inventory consists of two contiguous /24 blocks (194.61.247.0/24 and 194.61.248.0/24), forming a compact and uniform corporate allocation.

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
AS5089Virgin Media Limited122

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-31, 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 2 prefixes · 512 addresses IPv6 0 prefixes

CountryNamePrefixes
GBUnited Kingdom2

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS203652
Registry name
IBMUK
Registrant
IBM United Kingdom Limited
Abuse contact
David.allen@uk.ibm.com
Registered
2015-11-24
Last changed
2020-11-16
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 2 with no ROA
ROAs
0 authorising AS203652
ASPA
no ASPA record
IRR
0% registered · 0 of 2 announcements
Route objects
0 naming AS203652

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: 447 networks and 1,845 prefixes, as published 2026-10-31. 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