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MAC prefix 40:04:0C

Assigned by the IEEE to A&T.

Prefix
40:04:0C   40-04-0C   4004.0C
Block type
MA-L (16,777,216 addresses)
Address range
40:04:0C:00:00:00 – 40:04:0C:FF:FF:FF
Organization
A&T
Registered address
#411, Will Town, 402-3, Bucheon-Si Gyeonggi-Do 420-814, KR
Country
South Korea (KR)
Address bits
Unicast (I/G bit 0), globally unique (U/L bit 0)

Look up 40:04:0C:00:00:00

A&T holds 1 block in total: see all. Source: IEEE Registration Authority public listing.