macadress

Work Microwave GmbH

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:12:B4:00:00:00 /24
Vendor addressRudolf-Diesel-Ring 2 Holzkirchen DE 83607
Country🇩🇪  Germany
RegisteredNov 16, 2004
Block range00:12:B4:00:00:00– 00:12:B4:FF:FF:FF
Address capacity16,777,216
AdministrationUniversally administered: its prefix comes from a block registered through the IEEE Registration Authority
TransmissionUnicast: addressed to a single device
SourceIEEE Registration Authority

Address capacity is the size of this registered block, not a count of devices actually manufactured or online. Registration identifies the organization holding the block, not a specific device model or unit.

Curious how a prefix like this turns into a full address? See how MAC addresses are structured →

Ownership timeline

  1. Nov 16, 2004 – Dec 31, 2007 Work GmbH name changed
  2. Dec 31, 2007 – present Work Microwave GmbH

Example addresses in this block

00:12:B4:00:00:00 00:12:B4:7F:FF:FF 00:12:B4:FF:FF:FF

Where this block sits

Previous 00:12:B3:00:00:00 /24 Advance Wireless Technology Corp. Next 00:12:B5:00:00:00 /24 Vialta, Inc.

The nearest registered blocks of the same size on either side of this one in IEEE's address space.

Work Microwave GmbH holds 1 registered blocks in the IEEE registry, ranking #32,451 of 33,421 organizations by block count.