IBM UNITED KINGDOM LIMITED
IBM United Kingdom Limited
Data as of 2026-07-26
GLEIF verified
Complete entity footprint
10 linked clusters ·
939 netblocks ·
19,879,688 IPv4 addresses ·
183 IPv6 prefixes
This organisation's clusters combined by evidence —
shared GLEIF corporate family
— not name similarity, so genuinely different organisations that share a name are excluded.
LEI
1LIRV9SMMGVLN0CS4V88
Registered name
IBM UNITED KINGDOM LIMITED
Jurisdiction
Cluster stats
| Netblocks | 10 · 1,576 IPv4 addresses |
| IPv6 | 2 prefixes (largest 2a00:2381:1f::/48) |
| Cluster ID | 214477351 |
| Registry | BGP |
| Owner jurisdiction | GB |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | GLEIF legal-entity match |
| Legal identity | LEI 1LIRV9SMMGVLN0CS4V88 |
| Shared handles | clustered on 10 shared RIR contact/maintainer handles |
| Registry names | 5 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works · report an issue | |
Footprint over time
6 weekly snapshots · JSON
10
0 netblocks since 2026-07-05
2026-07-05
peak 10
2026-07-26
IP Ranges (10)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 193.42.144.0/24 | IBM United Kingdom Limited | RIPE | ASSIGNED PI | ● high |
| 194.61.247.0 – 194.61.250.255 | IBM United Kingdom Limited | RIPE | ASSIGNED PI | ● high |
| 194.61.247.0/24 | IBM United Kingdom Limited | BGP | ANNOUNCED | ● high |
| 194.61.248.0/24 | IBM United Kingdom Limited | BGP | ANNOUNCED | ● high |
| 193.240.71.0/28 | IBM-UNITED-KINGDOM-LTD | RIPE | ASSIGNED PA | ● low |
| 193.240.71.80/28 | IBM-UNITED-KINGDOM-LTD | RIPE | ASSIGNED PA | ● low |
| 194.88.74.0/24 | IBM-United-Kingdom-Ltd | RIPE | ASSIGNED PA | ● low |
| 213.105.33.160/29 | IBM-UNITED-KINGDOM-LIMITED | RIPE | ASSIGNED PA | ● low |
| 2a00:2381:1f::/48 | IBM-UNITED-KINGDOM-LTD | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a00:2381:fce4::/48 | IBM-UNITED-KINGDOM-LTD | RIPE | AGGREGATED-BY-LIR | ● low |
IPv6 ranges (2)
Corporate group (10 confirmed entities)
+10 additional unconfirmed candidates not shown — full list (JSON)- IBM Cloud 816 blocks
- International Business Machines Corporation 42 blocks
- Red Hat, Inc. 39 blocks
- IBM Deutschland GmbH 27 blocks
- IBM Singapore Pte Ltd 12 blocks
- Compagnie IBM France SAS 9 blocks
- VALUE TRANSFORMATION SERVICES S.P.A. 4 blocks
- International Business Machines of Belgium Ltd 3 blocks
- IBM Romania SRL 2 blocks
Network trust
what's this?
RPKI hygiene: D
how networks compare →
30.0%
of checked blocks have valid RPKI ROA coverage
(3 of 10)
Possible discrepancies (2)
These blocks are registered to IBM United Kingdom Limited but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.
| 2a00:2381:1f::/48 /48 | authorized for AS2856 — British Telecommunications Limited |
| 2a00:2381:fce4::/48 /48 | authorized for AS2856 — British Telecommunications Limited |
NIC Handles
AS203652
AS5089-MNT
BTNET-MNT
DUMY-RIPE
DUMY-RIPE
LEVEL3-MNT
ORG-IUL5-RIPE
QUZAUK
RIPE-NCC-END-MNT
UUNETDE-I