54:08:3B:8 Update Systems Inc.
Every MAC address from 54:08:3B:80:00:00 to 54:08:3B:8F:FF:FF belongs to a block the IEEE assigned to Update Systems Inc.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 54:08:3B:8 belongs to
Written 54:08:3B:8, 54-08-3B-8 or 54083B8, depending on the system. Look up a full address.
Prefix
54:08:3B:8/28
Organization
Update Systems Inc.
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
54:08:3B:80:00:00
Last address
54:08:3B:8F:FF:FF
Address type
Globally unique, unicast
Registered address
10545 Baur Blvd. Saint Louis MO US 63132
Parent block
Inside 54:08:3B
This MA-M block is carved from the 24-bit block 54:08:3B, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.