MAC prefix 20:57:AF
Shenzhen FH-NET OPTOELECTRONICS CO.,LTD
| Vendor | Shenzhen FH-NET OPTOELECTRONICS CO.,LTD |
|---|---|
| Short name | FHNETOPTOELE |
| Prefix | 20:57:AF/24 |
| Block type | MA-L (/24, 16,777,216 addresses) |
| Address range | 20:57:AF:00:00:00 – 20:57:AF:FF:FF:FF |
| Notations | 20:57:AF:00:00:0020-57-AF-00-00-002057.af00.00002057AF000000 |
Frequently asked questions
Which vendor does MAC address 20:57:AF belong to?
MAC addresses starting with 20:57:AF are assigned to Shenzhen FH-NET OPTOELECTRONICS CO.,LTD according to the IEEE registry (prefix length 24 bits).
How many addresses does block 20:57:AF contain?
The block contains 16,777,216 addresses from 20:57:AF:00:00:00 to 20:57:AF:FF:FF:FF.
Is 20:57:AF 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.