MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixA4:53:EE:00:00:00 /28
Vendor addressCtra. Madrid-Valencia Km. 196 Motilla del Palancar Cuenca ES 16200
RegisteredOct 23, 2020
Block rangeA4:53:EE:00:00:00– A4:53:EE:0F: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. Oct 23, 2020 – Oct 25, 2020 MASBER ELECTRIC SL name changed
  2. Oct 25, 2020 – present MAHLE ELECTRONICS, SLU

Example addresses in this block

Where this block sits

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

MAHLE ELECTRONICS, SLU holds 2 registered blocks in the IEEE registry, ranking #2,474 of 33,421 organizations by block count.

Other blocks registered to MAHLE ELECTRONICS, SLU