MAC prefix E4:12:89
topsystem GmbH
| Vendor | topsystem GmbH |
|---|---|
| Short name | topsystem |
| Prefix | E4:12:89/24 |
| Block type | MA-L (/24, 16,777,216 addresses) |
| Address range | E4:12:89:00:00:00 – E4:12:89:FF:FF:FF |
| Notations | E4:12:89:00:00:00E4-12-89-00-00-00e412.8900.0000E41289000000 |
Frequently asked questions
Which vendor does MAC address E4:12:89 belong to?
MAC addresses starting with E4:12:89 are assigned to topsystem GmbH according to the IEEE registry (prefix length 24 bits).
How many addresses does block E4:12:89 contain?
The block contains 16,777,216 addresses from E4:12:89:00:00:00 to E4:12:89:FF:FF:FF.
Is E4:12:89 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.