MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix50:0B:91:50:00:00 /28
Vendor addressNO.168 shugangdong road yangzhou city jiangsu china yangzhou CN 225000
Country🇨🇳 China
RegisteredSep 4, 2016
Block range50:0B:91:50:00:00– 50:0B:91:5F: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
50:0B:91:40:00:00 /28
Sinope technologies Inc
Next
50:0B:91:60:00:00 /28
Security Alarms & Co. S.A.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
jiangsu zhongling high-tech CO.,LTD. holds 1 registered blocks in the IEEE registry, ranking #17,159 of 33,427 organizations by block count.