MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixD4:20:00:50:00:00 /28
Vendor addressNo.8,Huashan Road,Xinbei District Changzhou,Jiangsu,China Changzhou Jiangsu CN 213000
Country🇨🇳 China
RegisteredJun 24, 2022
Block rangeD4:20:00:50:00:00– D4:20:00:5F: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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D4:20:00:40:00:00 /28
EVOC VIN Technology Co.,Ltd
Next
D4:20:00:60:00:00 /28
HiAR Information Technology Co.,Ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Monolith Electric?Changzhou?Co.,Ltd. holds 1 registered blocks in the IEEE registry, ranking #20,235 of 33,421 organizations by block count.