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:B7:30:00 /36
Vendor addressYousuien-nai Kyoto Kamigyo-ku JP 602-0008
Country🇯🇵 Japan
RegisteredNov 1, 2009
Block range00:50:C2:B7:30:00– 00:50:C2:B7:3F: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 →
Example addresses in this block
Where this block sits
Previous
00:50:C2:B7:20:00 /36
Advanced Desktop Systems Ltd
Next
00:50:C2:B7:40:00 /36
AXED Jakubowski Wojciechowski sp.j.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
ARKRAY, Inc. Kyoto Laboratory holds 3 registered blocks in the IEEE registry, ranking #913 of 33,421 organizations by block count.
Other blocks registered to ARKRAY, Inc. Kyoto Laboratory