MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixA0:28:33:80:00:00 /28
Vendor addressThe 2th floor,Longzeyuan Multi-use beijing CN 102208
Country🇨🇳 China
RegisteredMay 27, 2018
Block rangeA0:28:33:80:00:00– A0:28:33:8F: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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A0:28:33:70:00:00 /28
Kryptus Information Security S/A
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A0:28:33:90:00:00 /28
IMESHX CORPORATION LIMITED
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
HZHY TECHNOLOGY holds 2 registered blocks in the IEEE registry, ranking #2,223 of 33,427 organizations by block count.
Other blocks registered to HZHY TECHNOLOGY