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:A5:9C:30:00:00 /28
Vendor addressBuilding 5, No.11, Kechuang 14th Street, Economic-Technological Development Area Beijing CN 100176
RegisteredFeb 9, 2022
Block range18:A5:9C:30:00:00– 18:A5:9C:3F: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 →

Ownership timeline

  1. Feb 9, 2022 – Feb 26, 2022 BROADEX TECHNOLOGIES CO.LTD name changedaddress changed
  2. Feb 26, 2022 – present Beijing QS Medical Technology Co., Ltd.

Example addresses in this block

Where this block sits

The nearest registered blocks of the same size on either side of this one in IEEE's address space.

Beijing QS Medical Technology Co., Ltd. holds 1 registered blocks in the IEEE registry, ranking #6,673 of 33,421 organizations by block count.