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:C2:66:B0:00 /36
Vendor addressRm911,RegentOfficetel,547-8,Kuui-dong,Kwangjjin-gu seoul KR 143-709
Country🇰🇷 South Korea
RegisteredJul 30, 2008
Block range00:50:C2:66:B0:00– 00:50:C2:66:BF: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:C2:66:A0:00 /36
ABB Transmission and Distribution Automation Equipment (Xiamen) Co., Ltd.
Next
00:50:C2:66:C0:00 /36
DESY
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
flsystem holds 2 registered blocks in the IEEE registry, ranking #2,043 of 33,421 organizations by block count.
Other blocks registered to flsystem