Who owns MAC prefix 0003B7?

0003B7 is registered to ZACCESS Systems in the IEEE MA-L registry.

What devices use 0003B7?

Any network device with a MAC address starting 00:03:B7 was manufactured by or for ZACCESS Systems.

MA-L · OUI prefix

ZACCESS Systems

Any MAC address starting 00:03:B7 is registered to ZACCESS Systems in US.

OUI prefix	0003B7
Vendor	ZACCESS Systems
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:03:B7:00:00:00

What this means

The IEEE assigned the MA-L block 0003B7 to ZACCESS Systems. 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 00:03:B7, it is ZACCESS Systems hardware.

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