MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix38:FD:FE:90:00:00 /28
Vendor addressProfsoyuznaya st. 124A Moscow Moscow RU 117321
Country🇷🇺 Russia
RegisteredDec 13, 2015
Block range38:FD:FE:90:00:00– 38:FD:FE: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
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38:FD:FE:80:00:00 /28
Indra Navia AS
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38:FD:FE:A0:00:00 /28
Management Service Corporation
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
OOO Group of Industrial Technologies holds 2 registered blocks in the IEEE registry, ranking #2,675 of 33,427 organizations by block count.
Other blocks registered to OOO Group of Industrial Technologies