MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix18:74:E2:20:00:00 /28
Vendor address5D4, Block CD, Tianji Building, Tian'an Digital City, Futian District, Shenzhen Shenzhen Guangdong?China CN 518040
Country🇨🇳 China
RegisteredApr 3, 2021
Block range18:74:E2:20:00:00– 18:74:E2:2F: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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18:74:E2:10:00:00 /28
Sartorius Lab Instruments GmbH & Co. KG
Next
18:74:E2:30:00:00 /28
CT Company
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Shenzhen WITSTECH Co.,Ltd. holds 1 registered blocks in the IEEE registry, ranking #27,021 of 33,427 organizations by block count.