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:F3:B0:00 /36
Vendor addressaota5-15-26 yamagata JP 990-2435
Country🇯🇵 Japan
RegisteredFeb 19, 2012
Block range00:50:C2:F3:B0:00– 00:50:C2:F3: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
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00:50:C2:F3:A0:00 /36
Saia-Burgess Controls AG
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00:50:C2:F3:C0:00 /36
Vemco Sp. z o. o.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
TAMS firmware co. holds 1 registered blocks in the IEEE registry, ranking #29,161 of 33,421 organizations by block count.