54:EF:5B Science Corporation
Every MAC address from 54:EF:5B:00:00:00 to 54:EF:5B:FF:FF:FF belongs to a block the IEEE assigned to Science Corporation. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 54:EF:5B belongs to
Written 54:EF:5B, 54-EF-5B or 54EF5B, depending on the system. Look up a full address.
Prefix
54:EF:5B
Organization
Science Corporation
Registry
MA-L (a 24-bit OUI)
Addresses
16,777,216
First address
54:EF:5B:00:00:00
Last address
54:EF:5B:FF:FF:FF
Address type
Globally unique, unicast
Registered address
300 Wind River Way Alameda CA US 94501