Who owns MAC prefix 0040E4?

0040E4 is registered to E-M TECHNOLOGY, INC. in the IEEE MA-L registry.

What devices use 0040E4?

Any network device with a MAC address starting 00:40:E4 was manufactured by or for E-M TECHNOLOGY, INC..

MA-L · OUI prefix

E-M TECHNOLOGY, INC.

Any MAC address starting 00:40:E4 is registered to E-M TECHNOLOGY, INC. in US.

OUI prefix	0040E4
Vendor	E-M TECHNOLOGY, INC.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:40:E4:00:00:00

What this means

The IEEE assigned the MA-L block 0040E4 to E-M TECHNOLOGY, INC.. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 00:40:E4, it is E-M TECHNOLOGY, INC. hardware.

Look up another MAC