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:DC:40:00 /36
Vendor addressUellendahler Str. 199 Wuppertal NRW DE 42109
Country🇩🇪 Germany
RegisteredFeb 20, 2011
Block range00:50:C2:DC:40:00– 00:50:C2:DC:4F: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
00:50:C2:DC:30:00 /36
ZED Ziegler Electronic Devices GmbH
Next
00:50:C2:DC:50:00 /36
Saia-Burgess Controls AG
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Keith & Koep GmbH holds 21 registered blocks in the IEEE registry, ranking #165 of 33,421 organizations by block count.
Other blocks registered to Keith & Koep GmbH
64:D2:41:00:00:00 /24
MA-L
00:50:C2:0E:C0:00 /36
IAB
00:50:C2:3B:80:00 /36
IAB
00:50:C2:66:80:00 /36
IAB
00:50:C2:70:10:00 /36
IAB
00:50:C2:78:60:00 /36
IAB
00:50:C2:82:B0:00 /36
IAB
00:50:C2:8B:50:00 /36
IAB
00:50:C2:94:20:00 /36
IAB
00:50:C2:99:00:00 /36
IAB
00:50:C2:9F:20:00 /36
IAB
00:50:C2:A7:70:00 /36
IAB