MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix50:19:11:40:00:00 /28
Vendor addressBuilding 7, Yard 704, Gaota Art Zone, Feijiacun Village, Cuigezhuang Township, Chaoyang District, Beijing beijing China/beijing CN 100102
Country🇨🇳 China
RegisteredJun 25, 2026
Block range50:19:11:40:00:00– 50:19:11:4F: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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50:19:11:30:00:00 /28
Ingersoll-Rand
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50:19:11:50:00:00 /28
Shenzhen COI Technology Co.,LTD
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Stavecho Intelligence Technology (Beijing) Co., Ltd holds 1 registered blocks in the IEEE registry, ranking #28,356 of 33,427 organizations by block count.