NATIONWIDE BUILDING SOCIETY
Data as of 2026-07-26
GLEIF verified
Complete entity footprint
3 linked clusters ·
120 netblocks ·
132,113 IPv4 addresses ·
7 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
549300XFX12G42QIKN82
Registered name
NATIONWIDE BUILDING SOCIETY
Jurisdiction
Ultimate parent
No parent on file in GLEIF
Cluster stats
| Netblocks | 114 · 131,072 IPv4 addresses |
| IPv6 | 5 prefixes (largest 2a0a:f080::/29) |
| Cluster ID | 213289523 |
| Registry | BGP |
| Owner jurisdiction | GB |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | GLEIF legal-entity match |
| Legal identity | LEI 549300XFX12G42QIKN82 |
| Shared handles | clustered on 9 shared RIR contact/maintainer handles |
| Registry names | 4 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works · report an issue | |
Footprint over time
6 weekly snapshots · JSON
116
0 netblocks since 2026-07-05
2026-07-05
peak 116
2026-07-26
IP Ranges (114)
showing 50 of 114 — see all — ⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 155.131.0.0/16 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.0.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.4.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.8.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.10.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.12.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.16.0/21 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.24.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.28.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.30.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.32.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.36.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.40.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.44.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.46.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.48.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.52.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.54.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.56.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.58.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.60.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.64.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.66.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.68.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.72.0/21 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.80.0/20 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.96.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.100.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.104.0/21 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.112.0/21 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.120.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.122.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.124.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.126.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.128.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.132.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.136.0/21 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.144.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.146.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.148.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.152.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.154.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.156.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.158.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.160.0/20 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.176.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.180.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.182.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.184.0/22 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
| 155.131.188.0/23 | NATIONWIDE BUILDING SOCIETY | BGP | ANNOUNCED | ● high |
IPv6 ranges (5)
Domains hosted in this network
what's this?Corporate group (3 confirmed entities)
- CYBG-PLC 5 blocks
- Virgin Money plc 1 blocks
Network trust
what's this?
RPKI hygiene: F
how networks compare →
3.4%
of checked blocks have valid RPKI ROA coverage
(4 of 116)
Possible discrepancies (4)
These blocks are registered to NATIONWIDE BUILDING SOCIETY 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.
| 2a00:2381:1802::/48 /48 | authorized for AS2856 — British Telecommunications Limited |
| 2a00:2381:e431::/48 /48 | authorized for AS2856 — British Telecommunications Limited |
| 2a00:2381:2c8e::/48 /48 | authorized for AS2856 — British Telecommunications Limited |
| 2a00:2381:2c8e::/56 /56 | authorized for AS2856 — British Telecommunications Limited |
NIC Handles
AS8698
BTNET-MNT
DUMY-RIPE
DUMY-RIPE
NBS-NSS-MNT
NBS-NSS-MNT
ORG-NBS10-RIPE
RIPE-NCC-HM-MNT
RIPE-NCC-LEGACY-MNT