SHENZHEN GRID TECHNOLOGY CO.,LTD

MA-M

MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.

PrefixB0:1F:81:50:00:00 /28

Vendor address6thfloor,jinda Technology Center,No.8 of kefeng Road ,Science and Technology Park,NanshanDist,Shenzhen shenzhen guangdong CN 518054

Country🇨🇳 China

RegisteredOct 16, 2015

Block rangeB0:1F:81:50:00:00– B0:1F:81:5F: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

B0:1F:81:50:00:00 B0:1F:81:57:FF:FF B0:1F:81:5F:FF:FF

Where this block sits

Previous B0:1F:81:40:00:00 /28 SHENZHEN YIFANG DIGITAL TECHNOLOGY CO.,LTD. Next B0:1F:81:60:00:00 /28 COMOTA Co., Ltd.

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

SHENZHEN GRID TECHNOLOGY CO.,LTD holds 1 registered blocks in the IEEE registry, ranking #26,453 of 33,421 organizations by block count.