MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix08:3C:03:C0:00:00 /28
Vendor addressRoom 202, No. 17, Sanzhong Xinglong Road, Qingxi Town Dongguan City CN 523000
Country🇨🇳 China
RegisteredJan 13, 2026
Block range08:3C:03:C0:00:00– 08:3C:03:CF: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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08:3C:03:A0:00:00 /28
Luxshare Precision Industry Co., Ltd.
Next
08:3C:03:D0:00:00 /28
Yinglian Technology Co.,Ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Dongguan Development Security Intelligent Tech Co., Ltd holds 1 registered blocks in the IEEE registry, ranking #10,649 of 33,427 organizations by block count.