macadress

Rotel

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.
Prefix0C:EF:AF:90:00:00 /28
Vendor address43-59 Queens Road East Wanchai Hong Kong HK 00000
Country🇭🇰  Hong Kong
RegisteredOct 16, 2015
Block range0C:EF:AF:90:00:00– 0C:EF:AF: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

0C:EF:AF:90:00:00 0C:EF:AF:97:FF:FF 0C:EF:AF:9F:FF:FF

Where this block sits

Previous 0C:EF:AF:80:00:00 /28 BSX Athletics Next 0C:EF:AF:A0:00:00 /28 chengdu joyotime Technology Co., Ltd.

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

Rotel holds 1 registered blocks in the IEEE registry, ranking #24,805 of 33,427 organizations by block count.