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:BF:B4:20:00:00 /28
Vendor address380 Stevens Avenue Solana Beach CA US 92075
Country🇺🇸 United States
RegisteredOct 21, 2025
Block range0C:BF:B4:20:00:00– 0C:BF:B4:2F: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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0C:BF:B4:10:00:00 /28
Innomotics GmbH
Next
0C:BF:B4:30:00:00 /28
ShenZhen XunDun Technology CO.LTD
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Macnica Technology holds 2 registered blocks in the IEEE registry, ranking #2,467 of 33,421 organizations by block count.
Other blocks registered to Macnica Technology