MAC prefix 78:5F:28

EM Microelectronic

VendorEM Microelectronic
Short nameEMMicroelect
Prefix78:5F:28/24
Block typeMA-L (/24, 16,777,216 addresses)
Address range78:5F:28:00:00:00 – 78:5F:28:FF:FF:FF
Notations78:5F:28:00:00:00
78-5F-28-00-00-00
785f.2800.0000
785F28000000

Frequently asked questions

Which vendor does MAC address 78:5F:28 belong to?

MAC addresses starting with 78:5F:28 are assigned to EM Microelectronic according to the IEEE registry (prefix length 24 bits).

How many addresses does block 78:5F:28 contain?

The block contains 16,777,216 addresses from 78:5F:28:00:00:00 to 78:5F:28:FF:FF:FF.

Is 78:5F:28 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 EM Microelectronic have?

EM Microelectronic holds 76 registered prefixes in total – the full list is on the vendor page.

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