COSTAIN GROUP PLC
COSTAIN
LEI
213800PKIJBZ2EDTKC88
Registered name
COSTAIN GROUP PLC
Jurisdiction
Ultimate parent
No parent on file in GLEIF
Cluster stats
| Netblocks | 19 |
| All fragments | 23 blocks across 5 clusters |
| Cluster ID | 192058970 |
| Registry | AFRINIC |
| Owner jurisdiction | GB |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | unresolved |
| Legal identity | LEI 213800PKIJBZ2EDTKC88 |
| Shared handles | clustered on 9 shared RIR contact/maintainer handles |
| Registry names | 5 distinct registrant names across these blocks |
| full provenance (JSON) → · how attribution works | |
IP Ranges (19)
⬇ export CSV| CIDR | Org name | Registry | Status | Confidence |
|---|---|---|---|---|
| 62.6.171.128/28 | COSTAIN | RIPE | ASSIGNED PA | ● low |
| 81.142.24.72/29 | COSTAIN | RIPE | ASSIGNED PA | ● low |
| 94.30.57.136/29 | COSTAIN-NET | RIPE | ASSIGNED PA | ● low |
| 195.27.35.80/29 | COSTAIN | RIPE | ASSIGNED PA | ● low |
| 217.14.89.84/30 | COSTAIN | AFRINIC | ASSIGNED PA | ● low |
| 217.14.89.128/28 | COSTAIN | AFRINIC | ASSIGNED PA | ● low |
| 217.33.90.152/29 | COSTAIN | RIPE | ASSIGNED PA | ● low |
| 217.34.60.248/29 | COSTAIN | RIPE | ASSIGNED PA | ● low |
| 217.34.61.0/29 | COSTAIN | RIPE | ASSIGNED PA | ● low |
| 217.34.233.208/29 | Costain | RIPE | ASSIGNED PA | ● low |
| 217.34.239.216/29 | Costain | RIPE | ASSIGNED PA | ● low |
| 217.34.250.88/29 | COSTAIN | RIPE | ASSIGNED PA | ● low |
| 217.40.38.80/29 | Costain | RIPE | ASSIGNED PA | ● low |
| 217.45.155.80/29 | Costain | RIPE | ASSIGNED PA | ● low |
| 217.135.38.96/27 | Costain | RIPE | ASSIGNED PA | ● low |
| 2a00:2381:a::/56 | COSTAIN | RIPE | ASSIGNED | ● low |
| 2a00:2381:a::/48 | COSTAIN | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a00:2381:339::/48 | COSTAIN | RIPE | AGGREGATED-BY-LIR | ● low |
| 2a00:2381:e24::/48 | COSTAIN-GROUP-PLC | RIPE | AGGREGATED-BY-LIR | ● low |
Network trust
what's this?
RPKI hygiene: B
how networks compare →
89.5%
of checked blocks have valid RPKI ROA coverage
(17 of 19)
Possible discrepancies (4)
These blocks are registered to COSTAIN 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:a::/48 /48 | authorized for AS2856 — British Telecommunications PLC |
| 2a00:2381:339::/48 /48 | authorized for AS2856 — British Telecommunications PLC |
| 2a00:2381:e24::/48 /48 | authorized for AS2856 — British Telecommunications PLC |
| 2a00:2381:a::/56 /56 | authorized for AS2856 — British Telecommunications PLC |
NIC Handles
AS5413-MNT
BTNET-MNT
CW-EUROPE-GSOC
DUMY-RIPE
DUMY-RIPE
GST-NG
VODAFONE-WORLDWIDE-MNTNER
YS2-AFRINIC
YS2-AFRINIC