MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixD0:AA:5F:20:00:00 /28
Vendor address1-8-1 Nishishinjuku Shinjuku Building 5F Shinjuku-ku Tokyo-to JP 160-0023
Country🇯🇵 Japan
RegisteredDec 5, 2024
Block rangeD0:AA:5F:20:00:00– D0:AA:5F:2F: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
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D0:AA:5F:10:00:00 /28
Xiaomi EV Technology Co., Ltd.
Next
D0:AA:5F:30:00:00 /28
Shenzhen Liandian Communication Technology Co.LTD
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
ACCEL LAB ltd. holds 1 registered blocks in the IEEE registry, ranking #3,821 of 33,421 organizations by block count.