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MAC prefix 08:00:5C

Assigned by the IEEE to FOUR PHASE SYSTEMS.

Prefix
08:00:5C   08-00-5C   0800.5C
Block type
MA-L (16,777,216 addresses)
Address range
08:00:5C:00:00:00 – 08:00:5C:FF:FF:FF
Organization
FOUR PHASE SYSTEMS
Registered address
2001 LOGIC DRIVE, SAN JOSE CA 95124-3452, US
Country
United States (US)
Address bits
Unicast (I/G bit 0), globally unique (U/L bit 0)

Look up 08:00:5C:00:00:00

FOUR PHASE SYSTEMS holds 1 block in total: see all. Source: IEEE Registration Authority public listing.