MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
PrefixE0:5A:9F:B0:00:00 /28
Vendor addressRoom 1903, Industrial and Research building of Sun Yat-Sen university,no.1, Yuexing 4th road, Yuehai street,Nanshan district Shenzhen Guangdong CN 518057
Country🇨🇳 China
RegisteredNov 17, 2018
Block rangeE0:5A:9F:B0:00:00– E0:5A:9F:BF: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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E0:5A:9F:A0:00:00 /28
Contemporary Amperex Technology Co., Limited
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E0:5A:9F:C0:00:00 /28
ShenZhen Mornsun Smartlinker Limited Co., LTD
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Shenzhen Rongan Networks Technology Co.,Ltd holds 1 registered blocks in the IEEE registry, ranking #26,821 of 33,427 organizations by block count.