54:91:AF:1 4MITech
Every MAC address from 54:91:AF:10:00:00 to 54:91:AF:1F:FF:FF belongs to a block the IEEE assigned to 4MITech. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 54:91:AF:1 belongs to
Written 54:91:AF:1, 54-91-AF-1 or 5491AF1, depending on the system. Look up a full address.
Prefix
54:91:AF:1/28
Organization
4MITech
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
54:91:AF:10:00:00
Last address
54:91:AF:1F:FF:FF
Address type
Globally unique, unicast
Registered address
711-A,Factory world, 274,Samsung-ro,Yeongtong-gu Suwon-si Gyeonggi-do KR 16522
Parent block
Inside 54:91:AF
This MA-M block is carved from the 24-bit block 54:91:AF, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.