38:73:EA:4 Light Blue Optics Ltd.
Every MAC address from 38:73:EA:40:00:00 to 38:73:EA:4F:FF:FF belongs to a block the IEEE assigned to Light Blue Optics Ltd.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 38:73:EA:4 belongs to
Written 38:73:EA:4, 38-73-EA-4 or 3873EA4, depending on the system. Look up a full address.
Prefix
38:73:EA:4/28
Organization
Light Blue Optics Ltd.
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
38:73:EA:40:00:00
Last address
38:73:EA:4F:FF:FF
Address type
Globally unique, unicast
Registered address
St John's Innovation Centre, Cowley Road Cambridge Cambridgeshire GB CB40WS
Parent block
Inside 38:73:EA
This MA-M block is carved from the 24-bit block 38:73:EA, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.