Alibaba (Beijing) Software Service Inc.

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.

Prefix4C:91:7A:C0:00:00 /28

Vendor addressNo. 301, 3 floor, 9 building, four district, Wangjing East Garden, Chaoyang District, Beijing Beijing CN 100102

Country🇨🇳 China

RegisteredJul 1, 2019

Block range4C:91:7A:C0:00:00– 4C:91:7A:CF: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

4C:91:7A:C0:00:00 4C:91:7A:C7:FF:FF 4C:91:7A:CF:FF:FF

Where this block sits

Previous 4C:91:7A:B0:00:00 /28 AvertX Next 4C:91:7A:D0:00:00 /28 Shenzhen bankledger Technology Co, Ltd

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

Alibaba (Beijing) Software Service Inc. holds 1 registered blocks in the IEEE registry, ranking #4,695 of 33,421 organizations by block count.