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:B0:20:00 /36
Vendor address42-20, Palyong-Dong Changwon-City Gyeongnam KR 641-847
Country🇰🇷 South Korea
RegisteredJul 19, 2009
Block range00:50:C2:B0:20:00– 00:50:C2:B0:2F: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
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00:50:C2:B0:10:00 /36
HSR Harald L. Reuter
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00:50:C2:B0:30:00 /36
Spider Tecnologia Ind. e Com. Ltda.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
MASTER CO LTD holds 1 registered blocks in the IEEE registry, ranking #19,266 of 33,421 organizations by block count.