MAC prefix 70:B3:D5:14:B
| Vendor | C21 Systems Ltd |
|---|---|
| Short name | C21 |
| Prefix | 70:B3:D5:14:B/36 |
| Block type | MA-S (/36, 4,096 addresses) |
| Address range | 70:B3:D5:14:B0:00 – 70:B3:D5:14:BF:FF |
| Notations | 70:B3:D5:14:B0:0070-B3-D5-14-B0-0070b3.d514.b00070B3D514B000 |
Frequently asked questions
Which vendor does MAC address 70:B3:D5:14:B belong to?
MAC addresses starting with 70:B3:D5:14:B are assigned to C21 Systems Ltd according to the IEEE registry (prefix length 36 bits).
How many addresses does block 70:B3:D5:14:B contain?
The block contains 4,096 addresses from 70:B3:D5:14:B0:00 to 70:B3:D5:14:BF:FF.
Is 70:B3:D5:14:B a unicast or multicast address?
The least significant bit of the first byte is 0 – it is a unicast address. The U/L bit is 0, so the address is globally unique (universally administered).
How do I find the MAC address of my device?
On Linux use ip link, on Windows getmac /v or ipconfig /all, on macOS ifconfig. Note: phones and recent operating systems often use random, locally administered addresses on Wi-Fi.
Which other MAC prefixes does C21 Systems Ltd have?
C21 Systems Ltd holds 3 registered prefixes in total – the full list is on the vendor page.