UK Grid Solutions Limited — 2 prefixes (MA-L)

UK Grid Solutions Limited holds two MA-L (24-bit OUI) blocks in the IEEE registry — 00:02:84 and 80:B3:2A — both registered to the company's Stafford, England manufacturing site, the UK hub of GE Vernova's Grid Automation business. The two IEEE entries carry slightly different organisation names ("UK Grid Solutions Limited" vs "UK Grid Solutions Ltd") and different Stafford postcodes (ST16 1TW vs ST17 4LX), a common artifact of separate registrations filed years apart. The entity itself is the product of a long corporate lineage: AREVA T&D UK Ltd → Alstom Grid UK Limited (after GE's 2015 acquisition of Alstom's power and grid businesses) → UK Grid Solutions Limited (2016–present), now under GE Vernova Energy UK Limited and ultimately GE Vernova (NYSE: GEV). The hardware behind these prefixes is OT/ICS critical-infrastructure equipment, not consumer or IT networking gear: protection-and-control relays (Multilin UR family, D60, F35, 745, 850 series), substation gateways (Multilin D400, G500), hardened industrial Ethernet switches, time-sync units, SCADA/HMI systems, HVDC control systems, and IEC 61850 merging units. The security implication is the key analyst takeaway. A MAC from these blocks belongs in an electrical substation, an HVDC link, or transmission infrastructure — sectors actively targeted by nation-state and ransomware actors. Appearance of one of these OUIs in an ordinary corporate or consumer network context is anomalous and warrants investigation. Note that the 00:02:84 block predates the current name: it traces to AREVA T&D, so era-spanning Alstom/GE devices may carry it.

IEEE assignment

2 prefixes → UK Grid Solutions Limited, Stafford, GB [Confirmed] — IEEE MA-L (lines 13818, 35750)

Registry / block size

both MA-L (24-bit OUI). Prefix 00-02-84 ("UK Grid Solutions Limited", St Leonards Building, Redhill Business Park, Stafford, GB ST16 1TW); prefix 80-B3-2A ("UK Grid Solutions Ltd", Harry Kerr Drive, Stafford, Staffordshire, GB ST17 4LX) [Confirmed] — IEEE MA-L. NOTE: IEEE's public OUI data publishes NO assignment/registration date; no date is recorded here. No MA-M (the IEEE MA-M registry) or MA-S (the IEEE MA-S registry) block found for this vendor.

Canonical company name

UK Grid Solutions Limited [Confirmed] — UK Companies House #04955841

HQ / country

St Leonards Building, Harry Kerr Drive (Redhill Business Park), Stafford, England, ST16 1WT — GB [Confirmed] — Companies House #04955841 / IEEE MA-L

Company status

active [Confirmed] — Companies House #04955841

Parent company

GE Vernova Energy UK Limited (Companies House #04267931), part of GE Vernova (NYSE: GEV). UK Grid Solutions Limited is the UK legal entity for GE Vernova's Grid Solutions business [Confirmed] — Companies House PSC filing; GE press release (Alstom power/grid acquisition close, Nov 2015)

Corporate lineage

AREVA T&D UK Ltd (incorporated 6 Nov 2003) → Alstom Grid UK Limited (2011; GE/Alstom deal closed Nov 2015) → UK Grid Solutions Limited (2016–present) [Confirmed] — Companies House #04955841; Alstom press release (AREVA T&D → Alstom Grid, 2010); GE acquisition press release

SIC codes

27110 (manufacture of electric motors, generators and transformers); 27120 (manufacture of electricity distribution and control apparatus) [Confirmed] — Companies House #04955841

Device types

OT/ICS substation and transmission hardware — protection/control relays (Multilin UR, D60, F35, 745, 850), substation gateways (Multilin D400, G500), hardened Ethernet switches and media converters, time-sync equipment, SCADA/HMI, HVDC converter/control systems, IEC 61850 merging units

[Confirmed] — gevernova.com Grid Solutions / gegridsolutions.com Multilin catalog

Predecessor OUI

00:02:84 traces to AREVA T&D (the pre-2016 holder); Alstom/GE-era devices may also present this prefix [Likely] — nmap-mac-prefixes dataset referencing IEEE OUI data

Security context

high-criticality OT/ICS attack surface. GE Vernova Grid Solutions runs an explicit cybersecurity product line (NERC CIP, EU NIS Directive, NESA IAS) spanning VLAN segmentation, firewalls, IDS, centralised user management, and anti-malware across relay/gateway/HMI/network tiers. The Stafford site is the UK's principal Grid Automation manufacturing location

[Confirmed] — gevernova.com Grid Solutions cybersecurity

Analyst note

a MAC from 00:02:84 or 80:B3:2A indicates GE Vernova / UK Grid Solutions OT hardware destined for substation, HVDC, or transmission environments. Such a prefix surfacing in a non-OT network is anomalous and should be investigated.