70:B3:D5:14:B C21 Systems Ltd
Every MAC address from 70:B3:D5:14:B0:00 to 70:B3:D5:14:BF:FF belongs to a block the IEEE assigned to C21 Systems Ltd. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 70:B3:D5:14:B belongs to
Written 70:B3:D5:14:B, 70-B3-D5-14-B or 70B3D514B, depending on the system. Look up a full address.
Prefix
70:B3:D5:14:B/36
Organization
C21 Systems Ltd
Registry
MA-S (36 bits)
Addresses
4,096
First address
70:B3:D5:14:B0:00
Last address
70:B3:D5:14:BF:FF
Address type
Globally unique, unicast
Registered address
Dunston Innovation Centre Chesterfield Derbyshire GB S41 8NG
Parent block
Inside 70:B3:D5
This MA-S block is carved from the 24-bit block 70:B3:D5, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.
Same organization
Other blocks assigned to C21 Systems Ltd
1 more block registered under the same name.