MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix38:3A:21:60:00:00 /28
Vendor address16/F., Finance & Technology Building, No. 11 Keyuan Road, Nanshan Dist. Shenzhen Guangdong CN 518057
Country🇨🇳 China
RegisteredJul 3, 2016
Block range38:3A:21:60:00:00– 38:3A:21:6F: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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38:3A:21:50:00:00 /28
OOO NPP Uraltechnologiya
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38:3A:21:70:00:00 /28
Chengdu Krosslan Technology Inc.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Shenzhen smart-core technology co.,ltd. holds 7 registered blocks in the IEEE registry, ranking #449 of 33,421 organizations by block count.