Access Device Integrated Communications Corp.

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.

PrefixB0:1F:81:C0:00:00 /28

Vendor addressNo. 839, Sec.3, ChungChing Road, Taichung City Taichung TW 42862

RegisteredOct 16, 2015

Block rangeB0:1F:81:C0:00:00– B0:1F:81: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

B0:1F:81:C0:00:00 B0:1F:81:C7:FF:FF B0:1F:81:CF:FF:FF

Where this block sits

Previous B0:1F:81:B0:00:00 /28 Rademacher Geraete-Elektronik GmbH Next B0:1F:81:D0:00:00 /28 TAIWAN Anjie Electronics Co.,Ltd.

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

Access Device Integrated Communications Corp. holds 1 registered blocks in the IEEE registry, ranking #3,841 of 33,421 organizations by block count.