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MAC prefix 00:00:3D

Assigned by the IEEE to UNISYS.

Prefix
00:00:3D   00-00-3D   0000.3D
Block type
MA-L (16,777,216 addresses)
Address range
00:00:3D:00:00:00 – 00:00:3D:FF:FF:FF
Organization
UNISYS
Registered address
MS8-010, SAN JOSE CA 95150-6685, US
Country
United States (US)
Address bits
Unicast (I/G bit 0), globally unique (U/L bit 0)

Look up 00:00:3D:00:00:00

UNISYS holds 2 blocks in total: see all. Source: IEEE Registration Authority public listing.