MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixF0:D7:AF:40:00:00 /28
Vendor addressRudower Chaussee 50 Berlin DE 12489
Country🇩🇪 Germany
RegisteredApr 15, 2020
Block rangeF0:D7:AF:40:00:00– F0:D7:AF:4F: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
Previous
F0:D7:AF:30:00:00 /28
720?bei jing?Health iTech Co.,Ltd
Next
F0:D7:AF:50:00:00 /28
Dongguan Huili electroacoustic Industrial Co.,ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
ADAM Audio GmbH holds 1 registered blocks in the IEEE registry, ranking #4,032 of 33,421 organizations by block count.