MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix8C:1F:64:12:30:00 /36
Vendor addressMaria-und-Georg-Dietrich-Str. 6 Offenburg DE 77652
Country🇩🇪 Germany
RegisteredAug 8, 2025
Block range8C:1F:64:12:30:00– 8C:1F:64:12:3F: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
Where this block sits
Previous
8C:1F:64:12:10:00 /36
Hefei EverACQ Technology Co., LTD
Next
8C:1F:64:12:50:00 /36
Hangzhou Sciener Smart Technology Co., Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
GeneSys Elektronik GmbH holds 2 registered blocks in the IEEE registry, ranking #2,085 of 33,427 organizations by block count.
Other blocks registered to GeneSys Elektronik GmbH