MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix40:11:75:A0:00:00 /28
Vendor address1st Floor ,C Block,NO.225,Jinger Road ,Konggang Economic District,Tianjin 300308 ,China Tianjin CN 300000
Country🇨🇳 China
RegisteredJul 4, 2019
Block range40:11:75:A0:00:00– 40:11:75:AF: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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40:11:75:90:00:00 /28
ADH Guardian USA
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40:11:75:B0:00:00 /28
Chongqing IQIYI Intelligence Technology Co., Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
BWT Tianjin Ltd. holds 1 registered blocks in the IEEE registry, ranking #7,567 of 33,427 organizations by block count.