Who owns MAC prefix 0021D4?

0021D4 is registered to Vollmer Werke GmbH in the IEEE MA-L registry.

What devices use 0021D4?

Any network device with a MAC address starting 00:21:D4 was manufactured by or for Vollmer Werke GmbH.

MA-L · OUI prefix

Vollmer Werke GmbH

Any MAC address starting 00:21:D4 is registered to Vollmer Werke GmbH in DE.

OUI prefix	0021D4
Vendor	Vollmer Werke GmbH
Registry	MA-L (24-bit, large block)
Country	DE
Example MAC	00:21:D4:00:00:00

What this means

The IEEE assigned the MA-L block 0021D4 to Vollmer Werke GmbH. 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 00:21:D4, it is Vollmer Werke GmbH hardware.

Look up another MAC