Herrmann Datensysteme GmbH - MAC Prefix 70B3D5B04 (MA-S)

What this means

The IEEE assigned the MA-S block 70B3D5B04 to Herrmann Datensysteme 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 70:B3:D5:B0:4, it is Herrmann Datensysteme GmbH hardware.

Frequently Asked Questions

Who owns MAC prefix 70B3D5B04?

70B3D5B04 is registered to Herrmann Datensysteme GmbH in the IEEE MA-S registry.

What does the MA-S registry type mean?

An MA-S assignment, formerly called OUI-36, covers 36 bits, giving the vendor 4,096 device addresses, the smallest block the IEEE issues. Herrmann Datensysteme GmbH's block covers 4,096 addresses.

What devices use 70B3D5B04?

Any network device with a MAC address starting 70:B3:D5:B0:4 was manufactured by or for Herrmann Datensysteme GmbH.

OUI prefix	70B3D5B04
Vendor	Herrmann Datensysteme GmbH
Registry	MA-S (36-bit, small block)
Block size	4,096 addresses
Country	DE
Other blocks by this vendor	1 total
Example MAC	70:B3:D5:B0:4:00:00:00