MAC prefix 84:A9:91
Cyber Trans Japan Co.,Ltd.
| Vendor | Cyber Trans Japan Co.,Ltd. |
|---|---|
| Short name | CyberTransJa |
| Prefix | 84:A9:91/24 |
| Block type | MA-L (/24, 16,777,216 addresses) |
| Address range | 84:A9:91:00:00:00 – 84:A9:91:FF:FF:FF |
| Notations | 84:A9:91:00:00:0084-A9-91-00-00-0084a9.9100.000084A991000000 |
Frequently asked questions
Which vendor does MAC address 84:A9:91 belong to?
MAC addresses starting with 84:A9:91 are assigned to Cyber Trans Japan Co.,Ltd. according to the IEEE registry (prefix length 24 bits).
How many addresses does block 84:A9:91 contain?
The block contains 16,777,216 addresses from 84:A9:91:00:00:00 to 84:A9:91:FF:FF:FF.
Is 84:A9:91 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.