SIR ROBERT MCALPINE LIMITED

Sir Robert McAlpine Ltd
Data as of 2026-07-26
GLEIF verified
LEI
213800T1UKLTW5TI2814
Registered name
SIR ROBERT MCALPINE LIMITED
Jurisdiction
GB
Ultimate parent
No parent on file in GLEIF
Cluster stats
Netblocks5 · 256 IPv4 addresses
IPv6 4 prefixes (largest 2a00:2381:ffed::/48)
All fragments 19 blocks across 2 clusters
Cluster ID215058375
RegistryRIPE
Owner jurisdictionGB
Customersfind customers using this network →
Evidence & provenance ?
Attribution GLEIF legal-entity match
Legal identityLEI 213800T1UKLTW5TI2814
Shared handles clustered on 7 shared RIR contact/maintainer handles
Registry names 4 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

IP Ranges (5)

⬇ export CSV
CIDR Org name Registry Status Confidence
193.32.39.0/24 Sir Robert McAlpine Ltd RIPE ASSIGNED PI ● high
2a00:2381:ffed::/48 Sir-Robert-McAlpine-Ltd RIPE AGGREGATED-BY-LIR ● low
2a00:2381:ffed:300::/56 SIR-ROBERT-MCALPINE RIPE ASSIGNED ● low
2a00:2381:ffed:700::/56 SIR-ROBERT-MCALPINE-LTD RIPE ASSIGNED ● low
2a00:2381:ffed:b00::/56 SIR-ROBERT-MCALPINE RIPE ASSIGNED ● low

IPv6 ranges (4)

CIDR
2a00:2381:ffed::/48
2a00:2381:ffed:300::/56
2a00:2381:ffed:700::/56
2a00:2381:ffed:b00::/56

Network trust

what's this?
RPKI hygiene: B how networks compare →
80.0% of checked blocks have valid RPKI ROA coverage (4 of 5)
Possible discrepancies (4)

These blocks are registered to Sir Robert McAlpine Ltd 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:ffed::/48 /48 authorized for AS2856 — British Telecommunications Limited
2a00:2381:ffed:300::/56 /56 authorized for AS2856 — British Telecommunications Limited
2a00:2381:ffed:700::/56 /56 authorized for AS2856 — British Telecommunications Limited
2a00:2381:ffed:b00::/56 /56 authorized for AS2856 — British Telecommunications Limited

NIC Handles

BTNET-MNT DUMY-RIPE DUMY-RIPE FLUID-MNT ORG-SRML2-RIPE RIPE-NCC-END-MNT SRM-MNT