MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix2C:26:5F:90:00:00 /28
Vendor addressLeydheckerstrasse 10 Darmstadt Hessen DE 64293
Country🇩🇪 Germany
RegisteredOct 16, 2015
Block range2C:26:5F:90:00:00– 2C:26:5F:9F: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 →
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.
Brüel & Kjaer Vibro GmbH holds 1 registered blocks in the IEEE registry, ranking #7,321 of 33,427 organizations by block count.