MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix8C:1F:64:42:A0:00 /36
Vendor addressPMO Shibadaimon 9F, 1-10-18 Shibadaimon Minato-ku Tokyo JP 102-0018
Country🇯🇵 Japan
RegisteredDec 3, 2024
Block range8C:1F:64:42:A0:00– 8C:1F:64:42:AF: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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8C:1F:64:42:90:00 /36
Abbott Diagnostics Technologies AS
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8C:1F:64:42:B0:00 /36
Gamber Johnson-LLC
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Atonarp Inc. holds 1 registered blocks in the IEEE registry, ranking #5,815 of 33,421 organizations by block count.