NATIONAL GRID PLC
National Grid
Data as of 2026-08-30
GLEIF verified
LEI
8R95QZMKZLJX5Q2XR704
Registered name
NATIONAL GRID PLC
Jurisdiction
Ultimate parent
No parent on file in GLEIF
Cluster stats
| Netblocks | 10 · 133,416 IPv4 addresses |
| IPv6 | 4 prefixes (largest 2a00:2381:888::/48) |
| Registered in | United States (4) · United Kingdom (2) |
| All fragments | 15 blocks across 5 clusters |
| Cluster ID | 233597833 |
| Registry | ARIN |
| Owner jurisdiction | GB |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | GLEIF legal-entity match |
| Legal identity | LEI 8R95QZMKZLJX5Q2XR704 |
| Shared handles | clustered on 12 shared RIR contact/maintainer handles |
| Registry names | 2 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works · report an issue | |
Footprint over time
10 weekly snapshots · JSON
10
0 netblocks since 2026-07-05
2026-07-05
peak 10
2026-08-30
IP Ranges (10)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 148.183.0.0/16 | National Grid | ARIN | DIRECT ALLOCATION | ● high |
| 159.74.0.0/16 | National Grid | ARIN | DIRECT ALLOCATION | ● high |
| 192.146.145.0/24 | National Grid | ARIN | DIRECT ALLOCATION | ● high |
| 198.74.8.0/21 | National Grid | ARIN | DIRECT ALLOCATION | ● high |
| 31.121.73.160/29 | NATIONAL-GRID | RIPE | ASSIGNED PA | ● low |
| 195.27.189.64/27 | NATIONAL-GRID | RIPE | ASSIGNED PA | ● low |
| 2a00:2381:888::/48 | NATIONAL-GRID | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a00:2381:888::/56 | NATIONAL-GRID | RIPE | ASSIGNED | ● low |
| 2a00:2381:d653::/48 | NATIONAL-GRID | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a00:2381:d653::/56 | NATIONAL-GRID | RIPE | ASSIGNED | ● low |
IPv6 ranges (4)
Network trust
what's this?
RPKI hygiene: C
how networks compare →
60.0%
of checked blocks have valid RPKI ROA coverage
(6 of 10)
Possible discrepancies (4)
These blocks are registered to National Grid 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.
| 2a00:2381:888::/48 /48 | authorized for AS2856 — British Telecommunications Limited |
| 2a00:2381:d653::/48 /48 | authorized for AS2856 — British Telecommunications Limited |
| 2a00:2381:888::/56 /56 | authorized for AS2856 — British Telecommunications Limited |
| 2a00:2381:d653::/56 /56 | authorized for AS2856 — British Telecommunications Limited |
NIC Handles
BTNET-MNT
CHAMP121-ARIN
DP1276-ARIN
DP1276-ARIN
DP1276-ARIN
DUMY-RIPE
DUMY-RIPE
NGUS
NGUS-Z
VODAFONE-WORLDWIDE-MNTNER
WILHE66-ARIN
WILHE66-ARIN