MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix70:B3:D5:B7:80:00 /36
Vendor addressHauptstr. 45-47 Kirchseeon Bavaria DE 85614
Country🇩🇪 Germany
RegisteredJan 25, 2015
Block range70:B3:D5:B7:80:00– 70:B3:D5:B7:8F: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 →
Ownership timeline
- Jan 25, 2015 – Mar 9, 2026 HOERMANN GmbH name changed
- Mar 9, 2026 – present Hörmann Warnsysteme GmbH
Example addresses in this block
Where this block sits
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Hörmann Warnsysteme GmbH holds 2 registered blocks in the IEEE registry, ranking #2,139 of 33,421 organizations by block count.
Other blocks registered to Hörmann Warnsysteme GmbH