MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix18:9B:A5:D0:00:00 /28
Vendor addressRM2210 PENG YUN GE JINGLI MANSION NO.48 BEILI ROAD SOUTH ShenZhen CN 518109
Country🇨🇳 China
RegisteredMay 28, 2017
Block range18:9B:A5:D0:00:00– 18:9B:A5:DF: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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18:9B:A5:C0:00:00 /28
Christ Electronic System GmbH
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18:9B:A5:E0:00:00 /28
Taiwan Name Plate Co.,LTD
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
legendsky tech holds 1 registered blocks in the IEEE registry, ranking #18,319 of 33,427 organizations by block count.