LONGI METER 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.

Prefix80:1D:0D:50:00:00 /28

Vendor addressNo. 25 Guangming Road, Yinchuan (National Level) Economic and Technological Development Zone Yinchuan Ningxia CN 750021

Country🇨🇳 China

RegisteredMar 25, 2026

Block range80:1D:0D:50:00:00– 80:1D:0D: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

80:1D:0D:50:00:00 80:1D:0D:57:FF:FF 80:1D:0D:5F:FF:FF

Where this block sits

Previous 80:1D:0D:40:00:00 /28 GTL Tecnologia e Sistemas Ltda Next 80:1D:0D:60:00:00 /28 Drowsy Digital Inc

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

LONGI METER CO.,LTD. holds 1 registered blocks in the IEEE registry, ranking #18,782 of 33,427 organizations by block count.