MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixA4:3B:FA:D0:00:00 /28
Vendor addressSevernyi proezd 1, k. 5/6 Chernogolovka Moscow Region 142432
Country🇷🇺 Russia
RegisteredOct 16, 2015
Block rangeA4:3B:FA:D0:00:00– A4:3B:FA:DF: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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A4:3B:FA:C0:00:00 /28
SHANGHAI XIETONG TECHNOLOGY INC.
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A4:3B:FA:E0:00:00 /28
The Magstim Company Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
JSC "Component-ASU" holds 2 registered blocks in the IEEE registry, ranking #2,330 of 33,421 organizations by block count.