MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixD0:C8:57:90:00:00 /28
Vendor addressPoly Building, 2702 Nanhai Avenue, Nanshan District Shenzhen Guangdong CN 518054
Country🇨🇳 China
RegisteredMar 28, 2019
Block rangeD0:C8:57:90:00:00– D0:C8:57:9F: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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D0:C8:57:80:00:00 /28
Nanjing Magewell Electronics Co.,Ltd
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D0:C8:57:A0:00:00 /28
shenzhen cnsun
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Shenzhen xiaosha Intelligence Technology Co. Ltd holds 1 registered blocks in the IEEE registry, ranking #27,038 of 33,427 organizations by block count.