MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix8C:1F:64:85:00:00 /36
Vendor address2-12-2 Nakane Meguro-ku TOKYO JP 1520031
Country🇯🇵 Japan
RegisteredAug 28, 2026
Block range8C:1F:64:85:00:00– 8C:1F:64:85:0F: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
Other blocks registered to Tokyo Denki Gijutsu Kogyo