MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix50:19:11:50:00:00 /28
Vendor addressRoom 406,B Building,SIBIONO BUILDING,19,1st Science & Technology Middle Road, Nanshan district, Shenzhen,China Shenzhen Shenzhen CN 51800
Country🇨🇳 China
RegisteredJun 27, 2026
Block range50:19:11:50:00:00– 50:19:11:5F: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
Previous
50:19:11:40:00:00 /28
Stavecho Intelligence Technology (Beijing) Co., Ltd
Next
50:19:11:70:00:00 /28
Guanghe Zhida Technology (Beijing) Co., Ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Shenzhen COI Technology Co.,LTD holds 1 registered blocks in the IEEE registry, ranking #26,306 of 33,427 organizations by block count.