MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix30:3D:51:60:00:00 /28
Vendor addressBld. #1, St. 356, Rd. Guo Shoujing Shanghai CN China
Country🇨🇳 China
RegisteredMay 14, 2022
Block range30:3D:51:60:00:00– 30:3D:51:6F: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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30:3D:51:50:00:00 /28
Media Hub Digital Smart Home Pty Ltd.
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30:3D:51:70:00:00 /28
Destiny Automate Limited
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Amber-Link Network Technology Co.,Ltd. holds 1 registered blocks in the IEEE registry, ranking #4,898 of 33,421 organizations by block count.