Who owns MAC prefix 00003F?

00003F is registered to SYNTREX, INC. in the IEEE MA-L registry.

What devices use 00003F?

Any network device with a MAC address starting 00:00:3F was manufactured by or for SYNTREX, INC..

MA-L · OUI prefix

SYNTREX, INC.

Any MAC address starting 00:00:3F is registered to SYNTREX, INC. in US.

OUI prefix	00003F
Vendor	SYNTREX, INC.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:00:3F:00:00:00

What this means

The IEEE assigned the MA-L block 00003F to SYNTREX, 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 00:00:3F, it is SYNTREX, INC. hardware.

Look up another MAC