Kahf Software Limited

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.

Prefix30:BB:28:80:00:00 /28

Vendor address3rd floor 86-90 Paul Street London GB EC2A 4NE

RegisteredAug 14, 2026

Block range30:BB:28:80:00:00– 30:BB:28:8F: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

30:BB:28:80:00:00 30:BB:28:87:FF:FF 30:BB:28:8F:FF:FF

Where this block sits

Previous 30:BB:28:70:00:00 /28 MSGQ TECHNOLOGIES SERVICES PRIVATE LIMITED Next 30:BB:28:90:00:00 /28 Shenzhen Shuangyunhe Technology Co.,Ltd.

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

Kahf Software Limited holds 1 registered blocks in the IEEE registry, ranking #17,423 of 33,427 organizations by block count.