MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix80:1D:0D:00:00:00 /28
Vendor address22-2, Hontorocho, Shimogyo-ku, Kyoto-shi Kyoto JP 600-8086
Country🇯🇵 Japan
RegisteredMar 25, 2026
Block range80:1D:0D:00:00:00– 80:1D:0D:0F:FF:FF
Address capacity1,048,576
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.
KbDevice,Inc. holds 2 registered blocks in the IEEE registry, ranking #2,347 of 33,427 organizations by block count.
Other blocks registered to KbDevice,Inc.