Unisys Corporation — 00:00:3D (MA-L)

Unisys Corporation holds the MA-L block 00:00:3D, registered under the bare organization name "UNISYS" with a San Jose, CA address. Unisys is a substantive, publicly traded company (NYSE: UIS), formed in 1986 from the merger of Sperry Corporation and Burroughs Corporation — two of the oldest names in computing, tracing lineage back to ENIAC and UNIVAC. Today Unisys operates as an enterprise IT and services vendor, with product lines including ClearPath Forward mainframe/cloud platforms, Stealth cybersecurity, and digital workplace services, which distinguishes this registration from a bare single-OUI shell. The cached registry snapshot also shows two other UNISYS-branded MA-L blocks — 08:00:0B under "UNISYS CORPORATION" at a Blue Bell, PA address, and 00:60:A2 under "NIHON UNISYS LIMITED CO." in Japan — which are distinct legal-entity registrations and are treated here as related but separate entries rather than folded into this vendor page. Device-type corroboration for 00:00:3D specifically (i.e., which historic Unisys hardware line shipped with this exact prefix) could not be confirmed from available web sources; the low, early-range prefix value is consistent with an early Ethernet-era assignment but no specific date or product could be verified without speculation.

Primary OUI / org

00:00:3D → "UNISYS" [Confirmed] — the IEEE MA-L registry

Registered address

MS8-010, San Jose, CA 95150-6685, US [Confirmed] — the IEEE MA-L registry

Registry class

MA-L (24-bit OUI) [Confirmed] — the IEEE MA-L registry

Assignment/registration date

Unknown — IEEE's public OUI data (the IEEE MA-L registry: Registry, Assignment, Organization Name, Organization Address) publishes no assignment date; not fabricated [Confirmed as absence] — the IEEE MA-L registry

Third-party "registration date" artifact (NOT an IEEE fact)

maclookup.app displays "registration date" 2000-11-09 and "last updated" 2015-11-17 for this prefix; these are third-party database artifacts, not IEEE-published facts [Confirmed-as-displayed / Unknown-as-IEEE-fact] — https://maclookup.app/vendors/unisys, https://mac.lc/company/unisys

Related but distinct registrations

08:00:0B → "UNISYS CORPORATION", Township Line Road, Blue Bell, PA 19424, US, MA-L [Confirmed]; 00:60:A2 → "NIHON UNISYS LIMITED CO.", P.O. Box 135, Shinonome 1-10-9, JP, MA-L [Confirmed] — the IEEE MA-L registry, the IEEE MA-L registry

Company status

active, publicly traded (NYSE: UIS) [Confirmed] — https://www.unisys.com/company-history/

Company history / substance

formed 1986 from the merger of Sperry Corporation and Burroughs Corporation, tracing lineage to ENIAC/UNIVAC-era computing [Confirmed] — https://www.unisys.com/company-history/

Current business lines

enterprise computing (ClearPath Forward), cloud services, cybersecurity (Stealth), digital workplace services [Confirmed] — https://www.unisys.com/company-history/

Device-type corroboration for 00

00:3D specifically: Unknown — no network capture, vendor documentation, or discussion ties this exact prefix to a named Unisys product; general historical evidence only that Unisys made networking hardware (e.g. an EISA Ethernet Controller card)

[Unknown] — https://www.computinghistory.org.uk/det/46117/Unisys-EISA-Ethernet-Controller/

Security context

no CVEs, advisories, or notable security research specific to this OUI/vendor found [Unknown] — (no source; absence noted honestly)

Already in oui-master

false [Confirmed] — this site's own enrichment records

Ambiguity note

three distinct UNISYS-branded MA-L registrations exist; this entry (vendor-unisys) covers only 00:00:3D, the bare-name "UNISYS" registration, as the closest slug match. 08:00:0B and 00:60:A2 would conventionally get their own distinct vendor slugs if enriched separately

[Likely] — the IEEE MA-L registry