MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixD0:22:12:50:00:00 /28
Vendor addressR.709-(2), B Zone, No.668 Eastern Beijing Rd. Shanghai P.R.C Shanghai Shanghai CN 200001
Country🇨🇳 China
RegisteredOct 16, 2015
Block rangeD0:22:12:50:00:00– D0:22:12:5F: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
D0:22:12:40:00:00 /28
Viatron GmbH
Next
D0:22:12:60:00:00 /28
URANO INDUSTRIA DE BALANCAS E EQUIPAMENTOS LTDA
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Shanghai Routech Co., Ltd holds 1 registered blocks in the IEEE registry, ranking #26,026 of 33,427 organizations by block count.