Rudolf Riester GmbH

MA-S

MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.

Prefix8C:1F:64:27:A0:00 /36

Vendor addressP.O. Box 35 Bruckstrasse 31 Jungingen DE 72417

RegisteredJan 20, 2026

Block range8C:1F:64:27:A0:00– 8C:1F:64:27:AF:FF

Address capacity4,096

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

8C:1F:64:27:A0:00 8C:1F:64:27:A7:FF 8C:1F:64:27:AF:FF

Where this block sits

Previous 8C:1F:64:27:70:00 /36 Shenzhen Angstrom Excellence Technology Co., Ltd Next 8C:1F:64:27:B0:00 /36 Oriux

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

Rudolf Riester GmbH holds 1 registered blocks in the IEEE registry, ranking #24,872 of 33,427 organizations by block count.