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.
Prefix40:D8:55:0A:10:00 /36
Vendor address7 KITA2 NISHI2 CYUO-KU SAPPORO HOKKAIDO JP 060-0002
Country🇯🇵 Japan
RegisteredFeb 17, 2013
Block range40:D8:55:0A:10:00– 40:D8:55:0A:1F: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.
ADVALY SYSTEM Inc. holds 2 registered blocks in the IEEE registry, ranking #1,452 of 33,421 organizations by block count.
Other blocks registered to ADVALY SYSTEM Inc.