MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix58:AD:08:40:00:00 /28
Vendor address501, 5th Floor, Building 8, Changyuan New Materials Port, No. 2 Gaoxin Middle Road, Nanshan District Shenzhen Guangdong CN 518000
Country🇨🇳 China
RegisteredDec 15, 2025
Block range58:AD:08:40:00:00– 58:AD:08:4F: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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58:AD:08:30:00:00 /28
Fujian Ruihe Technology Co., Ltd.
Next
58:AD:08:50:00:00 /28
Vanguard Protex Global
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Shenzhen Yumutek co.,ltd holds 1 registered blocks in the IEEE registry, ranking #27,091 of 33,427 organizations by block count.