RZB Rudolf Zimmermann, Bamberg GmbH - MAC Prefix 70B3D5D71 (MA-S)

What this means

The IEEE assigned the MA-S block 70B3D5D71 to RZB Rudolf Zimmermann, Bamberg 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:D7:1, it is RZB Rudolf Zimmermann, Bamberg GmbH hardware.

Frequently Asked Questions

Who owns MAC prefix 70B3D5D71?

70B3D5D71 is registered to RZB Rudolf Zimmermann, Bamberg 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. RZB Rudolf Zimmermann, Bamberg GmbH's block covers 4,096 addresses.

What devices use 70B3D5D71?

Any network device with a MAC address starting 70:B3:D5:D7:1 was manufactured by or for RZB Rudolf Zimmermann, Bamberg GmbH.

OUI prefix	70B3D5D71
Vendor	RZB Rudolf Zimmermann, Bamberg 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:D7:1:00:00:00