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:B1:4E:A0:00:00 /28
Vendor addressNo.8 Huafu Rd, Shangsha, Chang’an Town Dongguan Guangdong CN 523843
Country🇨🇳 China
RegisteredMar 6, 2026
Block range38:B1:4E:A0:00:00– 38:B1:4E:AF: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:B1:4E:90:00:00 /28
DCL COMMUNICATION PTE. LTD.
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38:B1:4E:B0:00:00 /28
Huizhou GYXX Technology Co., Ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Amissiontech Co., Ltd holds 1 registered blocks in the IEEE registry, ranking #4,972 of 33,421 organizations by block count.