MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix50:FA:CB:40:00:00 /28
Vendor address3/F, 2nd Building Hui Sheng Da industrial park, Qingcui road, Longhua district, Shenzhen Shenzhen Guangdong CN 518000
Country🇨🇳 China
RegisteredAug 28, 2025
Block range50:FA:CB:40:00:00– 50:FA:CB:4F: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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50:FA:CB:30:00:00 /28
Huaihua Jiannan Electronic Technology Co.,Ltd.
Next
50:FA:CB:50:00:00 /28
Shenzhen Hill Technology Co., LTD.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Darveen Technology Limited holds 1 registered blocks in the IEEE registry, ranking #9,826 of 33,427 organizations by block count.