MAC prefix 40:D8:55:0F:5
CST Group
| Vendor | CST Group |
|---|---|
| Short name | CSTGroup |
| Prefix | 40:D8:55:0F:5/36 |
| Block type | MA-S (/36, 4,096 addresses) |
| Address range | 40:D8:55:0F:50:00 – 40:D8:55:0F:5F:FF |
| Notations | 40:D8:55:0F:50:0040-D8-55-0F-50-0040d8.550f.500040D8550F5000 |
Frequently asked questions
Which vendor does MAC address 40:D8:55:0F:5 belong to?
MAC addresses starting with 40:D8:55:0F:5 are assigned to CST Group according to the IEEE registry (prefix length 36 bits).
How many addresses does block 40:D8:55:0F:5 contain?
The block contains 4,096 addresses from 40:D8:55:0F:50:00 to 40:D8:55:0F:5F:FF.
Is 40:D8:55:0F:5 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.