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:C2:45:40:00 /36
Vendor address4330 East-West Highway Bethesda MD US 20814
Country🇺🇸 United States
RegisteredJul 30, 2008
Block range00:50:C2:45:40:00– 00:50:C2:45:4F: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
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Brivo Systems, LLC holds 2 registered blocks in the IEEE registry, ranking #1,662 of 33,427 organizations by block count.
Other blocks registered to Brivo Systems, LLC