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:A0:11:20:00:00 /28
Vendor addressRoom502,No.48,Lane 451,Palm Road,Putuo District,Shanghai Shanghai Shanghai CN 200333
Country🇨🇳 China
RegisteredDec 19, 2023
Block rangeD0:A0:11:20:00:00– D0:A0:11:2F: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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D0:A0:11:10:00:00 /28
Shanghai Railway Communication Co. Ltd.
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D0:A0:11:30:00:00 /28
V-Count Teknoloji A.Åž.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Shanghai Hongqia Industry and Trade Co., LTD holds 1 registered blocks in the IEEE registry, ranking #25,945 of 33,427 organizations by block count.