MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix74:5B:C5:10:00:00 /28
Vendor addressBuilding No. 5, East Zone, No. 10, Xibeiwang East Road, Haidian District Beijing Beijing CN 100092
Country🇨🇳 China
RegisteredDec 7, 2018
Block range74:5B:C5:10:00:00– 74:5B:C5:1F: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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74:5B:C5:00:00:00 /28
IRS Systementwicklung GmbH
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74:5B:C5:20:00:00 /28
SIGLENT TECHNOLOGIES CO., LTD.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Beijing Inspiry Technology Co., Ltd. holds 2 registered blocks in the IEEE registry, ranking #1,606 of 33,427 organizations by block count.
Other blocks registered to Beijing Inspiry Technology Co., Ltd.