CARDIO SISTEMAS COMERCIAL E INDUSTRIAL LTDA

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.

Prefix6C:47:80:B0:00:00 /28

Vendor addressAVENIDA PAULISTA, 509 ANDAR 1, 3, 21 E 22, CONJUNTOS 308, 309 E 310 SAO PAULO SAO PAULO BR 01311910

RegisteredFeb 6, 2026

Block range6C:47:80:B0:00:00– 6C:47:80:BF: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

6C:47:80:B0:00:00 6C:47:80:B7:FF:FF 6C:47:80:BF:FF:FF

Where this block sits

Previous 6C:47:80:A0:00:00 /28 Prolink Surveillance Technology Co.Ltd Next 6C:47:80:C0:00:00 /28 ZVK GmbH

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

CARDIO SISTEMAS COMERCIAL E INDUSTRIAL LTDA holds 1 registered blocks in the IEEE registry, ranking #7,816 of 33,421 organizations by block count.