Sumitomo Wiring Systems, 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.

Prefix80:0A:80:20:00:00 /28

Vendor addressNagoya Lucent Tower 25F Nagoya Aichi JP 451-6025

RegisteredOct 16, 2015

Block range80:0A:80:20:00:00– 80:0A:80:2F: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

80:0A:80:20:00:00 80:0A:80:27:FF:FF 80:0A:80:2F:FF:FF

Where this block sits

Previous 80:0A:80:10:00:00 /28 Dongguan I-Chime electrinics Co.,Ltd Next 80:0A:80:30:00:00 /28 Beijing VControl Technology Co., Ltd.

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

Sumitomo Wiring Systems, Ltd. holds 1 registered blocks in the IEEE registry, ranking #28,540 of 33,427 organizations by block count.