MAC prefix E4:5D:51
| Vendor | Sfr |
|---|---|
| Prefix | E4:5D:51/24 |
| Block type | MA-L (/24, 16,777,216 addresses) |
| Address range | E4:5D:51:00:00:00 – E4:5D:51:FF:FF:FF |
| Notations | E4:5D:51:00:00:00E4-5D-51-00-00-00e45d.5100.0000E45D51000000 |
Frequently asked questions
Which vendor does MAC address E4:5D:51 belong to?
MAC addresses starting with E4:5D:51 are assigned to Sfr according to the IEEE registry (prefix length 24 bits).
How many addresses does block E4:5D:51 contain?
The block contains 16,777,216 addresses from E4:5D:51:00:00:00 to E4:5D:51:FF:FF:FF.
Is E4:5D:51 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 Sfr have?
Sfr holds 12 registered prefixes in total – the full list is on the vendor page.