macadress

Grundig

MA-M
MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixA4:DA:22:A0:00:00 /28
Vendor addressSteinhof 39 Erkrath North Rhine-Westphalia DE 40699
Country🇩🇪  Germany
RegisteredNov 12, 2017
Block rangeA4:DA:22:A0:00:00– A4:DA:22:AF:FF:FF
Address capacity1,048,576
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 12, 2017 – Feb 13, 2020 Abetechs GmbH name changed
  2. Feb 13, 2020 – present Grundig

Example addresses in this block

A4:DA:22:A0:00:00 A4:DA:22:A7:FF:FF A4:DA:22:AF:FF:FF

Where this block sits

Previous A4:DA:22:90:00:00 /28 Malldon Technology Limited Next A4:DA:22:B0:00:00 /28 Klashwerks Inc.

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

Grundig holds 1 registered blocks in the IEEE registry, ranking #14,027 of 33,427 organizations by block count.