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MAC prefix 00:12:0F

Assigned by the IEEE to IEEE 802.3.

Prefix
00:12:0F   00-12-0F   0012.0F
Block type
MA-L (16,777,216 addresses)
Address range
00:12:0F:00:00:00 – 00:12:0F:FF:FF:FF
Organization
IEEE 802.3
Address bits
Unicast (I/G bit 0), globally unique (U/L bit 0)

Look up 00:12:0F:00:00:00

IEEE 802.3 holds 1 block in total: see all. Source: IEEE Registration Authority public listing.