Ultra Electronics Command & Control Systems — 2 prefixes (MA-L)

Ultra Electronics Command & Control Systems is a UK defence and aerospace systems integrator, historically based at Knaves Beech Business Centre in Hemel Hempstead and more recently associated with Loudwater, High Wycombe, that formed part of the former Ultra Electronics Group before the group's break-up and rebrand; the command-and-control line now trades as Ultra I&C (Ultra Intelligence & Communications). The IEEE registry shows two separate MA-L blocks — 00-90-58 and 00-E0-6C — assigned to the identical organization name and address, which is itself notable: a single-OUI shell registrant would carry only one block, while two independently-issued blocks under one legal entity is evidence of sustained hardware output rather than a one-off registration. Vendor-published material corroborates real product substance: a PacketAssure iQ1000 intelligent Layer-2 Gigabit Ethernet switch, the ORION family of tactical radios, and command-and-control/cybersecurity platforms for tactical networks. No CVEs, security advisories, or field sightings of either OUI in live traffic were found in this research pass, so the operational/security context below is vendor-self-described only, not independently confirmed by third-party telemetry.

IEEE assignment

two MA-L blocks, 00-90-58 and 00-E0-6C, both registered to "Ultra Electronics Command & Control Systems" [Confirmed] — the IEEE MA-L registry

Registry / block size

MA-L (24-bit OUI) x2; no MA-M (the IEEE MA-M registry) or MA-S (the IEEE MA-S registry) block found under this exact org name [Confirmed] — the IEEE MA-L registry, the IEEE MA-M registry, the IEEE MA-S registry

HQ / country

Knaves Beech Business Centre, Hemel Hempstead, Herts, England, GB, HP2 7BW (registry address, printed with a typo as "Hemel Hemstead" in the source registry); current corporate presence associated with Loudwater, High Wycombe, GB [Confirmed] — the IEEE MA-L registry, https://www.ultra-ic.com/

Company identity / status

operates today as Ultra I&C (Ultra Intelligence & Communications), a successor brand of the former Ultra Electronics Group's command-and-control business [Confirmed] — https://www.ultra-ic.com/, https://en.wikipedia.org/wiki/Ultra_Electronics

Device types / product corroboration

command-and-control platforms, tactical communications (ORION radio family delivered to the US DoD), cybersecurity/crypto for tactical networks, and the PacketAssure iQ1000 Layer-2 Gigabit Ethernet switch (the most plausible MAC-bearing product)

[Confirmed] — https://www.ultra-ic.com/command-control/, https://www.ultra-ic.com/mission-solutions/

Ambiguity note

two distinct OUI blocks share the identical org name/address for this single vendor slug; neither the slug nor the source batch list (this site's own enrichment records) specifies which prefix is canonical, so both are recorded rather than one being arbitrarily selected

[Confirmed] — the IEEE MA-L registry, this site's own enrichment records

Registration date

Unknown — IEEE publishes no assignment/registration dates for MA-L blocks; no third-party "date registered" value was used or fabricated for either prefix [Confirmed as policy, not a data fact] — no citation (absence of an IEEE date field)

Security context

no CVEs, advisories, or field sightings (forums, scanner reports) of either OUI in real traffic were found; usage context is vendor-self-described only [Unknown] — no corroborating third-party source found

IANA reference

not applicable — this is a MAC OUI (MA-L) entry, not an ASN/RIR resource, so no IANA RFC reference applies [Confirmed]

Related vendors (distinct OUI holders, former Ultra Electronics Group divisions, excluded from this entry)

Ultra Electronics Sonar System Division, Ultra Electronics Electrics, Ultra Electronics - TCS (Tactical Communication Systems) [Confirmed] — the IEEE MA-L registry, the IEEE MA-S registry