1C:21:D1:B Global Design Solutions Ltd
Every MAC address from 1C:21:D1:B0:00:00 to 1C:21:D1:BF:FF:FF belongs to a block the IEEE assigned to Global Design Solutions Ltd. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 1C:21:D1:B belongs to
Written 1C:21:D1:B, 1C-21-D1-B or 1C21D1B, depending on the system. Look up a full address.
Prefix
1C:21:D1:B/28
Organization
Global Design Solutions Ltd
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
1C:21:D1:B0:00:00
Last address
1C:21:D1:BF:FF:FF
Address type
Globally unique, unicast
Registered address
Unit 13 Bristol England GB BS44ED
Parent block
Inside 1C:21:D1
This MA-M block is carved from the 24-bit block 1C:21:D1, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.