MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:1B:1B:00:00:00 /24
Vendor addressI IA SC MF-K PE 3 76187 Karlsruhe Baden Wuerttemberg DE
Country🇩🇪 Germany
RegisteredJan 16, 2007
Block range00:1B:1B:00:00:00– 00:1B:1B:FF:FF:FF
Address capacity16,777,216
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 16, 2007 – Jun 23, 2009 Siemens AG, A&D AS EWK PU1 name changedaddress changed
- Jun 23, 2009 – present Siemens AG,
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.
Siemens AG holds 23 registered blocks in the IEEE registry, ranking #153 of 33,421 organizations by block count.