IAB: an Individual Address Block, a /36 covering 4,096 addresses. IEEE's predecessor to MA-S; no longer issued, but existing assignments remain valid.
Prefix00:50:C2:3F:30:00 /36
Vendor addressHavellandstr. 10-14 Mannheim DE 68309
Country🇩🇪 Germany
RegisteredJul 30, 2008
Block range00:50:C2:3F:30:00– 00:50:C2:3F: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 →
Ownership timeline
- Jul 30, 2008 – Jan 21, 2020 ABB AG - Power Grids - Grid Automation name changed
- Jan 21, 2020 – Aug 5, 2020 ABB Power Grids Germany AG – Grid Automation name changed
- Aug 5, 2020 – Dec 1, 2021 Hitachi ABB Power Grids – Grid Automation name changed
- Dec 1, 2021 – Nov 23, 2022 Hitachi Energy name changedaddress changed
- Nov 23, 2022 – present Hitachi Energy Germany 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.
Hitachi Energy Germany AG holds 2 registered blocks in the IEEE registry, ranking #2,201 of 33,427 organizations by block count.
Other blocks registered to Hitachi Energy Germany AG