58:20:8A:3 Aggregate Co.,Ltd.
Every MAC address from 58:20:8A:30:00:00 to 58:20:8A:3F:FF:FF belongs to a block the IEEE assigned to Aggregate Co.,Ltd.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 58:20:8A:3 belongs to
Written 58:20:8A:3, 58-20-8A-3 or 58208A3, depending on the system. Look up a full address.
Prefix
58:20:8A:3/28
Organization
Aggregate Co.,Ltd.
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
58:20:8A:30:00:00
Last address
58:20:8A:3F:FF:FF
Address type
Globally unique, unicast
Registered address
Toso Building 4F, 1-9-8 Yayoi-cho nakano-ku tokyo JP 164-0013
Parent block
Inside 58:20:8A
This MA-M block is carved from the 24-bit block 58:20:8A, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.