BEIJING FIBRLINK COMMUNICATIONS 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.

Prefix58:C4:1E:40:00:00 /28

Vendor addressDongxu International Centre, Fengtai District, Beijing BEIJING FENGTAI CN 100070

RegisteredApr 18, 2023

Block range58:C4:1E:40:00:00– 58:C4:1E:4F: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

58:C4:1E:40:00:00 58:C4:1E:47:FF:FF 58:C4:1E:4F:FF:FF

Where this block sits

Previous 58:C4:1E:30:00:00 /28 Lemco IKE Next 58:C4:1E:50:00:00 /28 Zhejiang Cainiao Supply Chain Management Co.,Ltd

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

BEIJING FIBRLINK COMMUNICATIONS CO.,LTD. holds 1 registered blocks in the IEEE registry, ranking #6,542 of 33,421 organizations by block count.