MAC prefix 40:12:E4
Compass-EOS
| Vendor | Compass-EOS |
|---|---|
| Short name | CompassEOS |
| Prefix | 40:12:E4/24 |
| Block type | MA-L (/24, 16,777,216 addresses) |
| Address range | 40:12:E4:00:00:00 – 40:12:E4:FF:FF:FF |
| Notations | 40:12:E4:00:00:0040-12-E4-00-00-004012.e400.00004012E4000000 |
Frequently asked questions
Which vendor does MAC address 40:12:E4 belong to?
MAC addresses starting with 40:12:E4 are assigned to Compass-EOS according to the IEEE registry (prefix length 24 bits).
How many addresses does block 40:12:E4 contain?
The block contains 16,777,216 addresses from 40:12:E4:00:00:00 to 40:12:E4:FF:FF:FF.
Is 40:12:E4 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.