MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix4C:81:BE:A0:00:00 /28
Vendor addressRoom 509, Building B, Huashengda Building, No. 22 Bagua 4th Road, Shanglin Community, Yuanling Street, Futian District, Shenzhen City, Guangdong Province, China Shenzhen Guangdong CN 518029
Country🇨🇳 China
Block range4C:81:BE:A0:00:00– 4C:81:BE: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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4C:81:BE:90:00:00 /28
Shenzhen Jooan Technology Co., Ltd
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4C:81:BE:B0:00:00 /28
Guangdong Lidun New Energy Technology Co., Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Shenzhen Sinevolt Technology Co., Ltd holds 1 registered blocks in the IEEE registry, ranking #26,877 of 33,421 organizations by block count.