MAC prefix AC:81:12
| Vendor | Gemtek Technology Co., Ltd. |
|---|---|
| Short name | GemtekTechno |
| Prefix | AC:81:12/24 |
| Block type | MA-L (/24, 16,777,216 addresses) |
| Address range | AC:81:12:00:00:00 – AC:81:12:FF:FF:FF |
| Notations | AC:81:12:00:00:00AC-81-12-00-00-00ac81.1200.0000AC8112000000 |
Frequently asked questions
Which vendor does MAC address AC:81:12 belong to?
MAC addresses starting with AC:81:12 are assigned to Gemtek Technology Co., Ltd. according to the IEEE registry (prefix length 24 bits).
How many addresses does block AC:81:12 contain?
The block contains 16,777,216 addresses from AC:81:12:00:00:00 to AC:81:12:FF:FF:FF.
Is AC:81:12 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 Gemtek Technology Co., Ltd. have?
Gemtek Technology Co., Ltd. holds 15 registered prefixes in total – the full list is on the vendor page.