MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix8C:1F:64:16:80:00 /36
Vendor addressKashimada 1-1-2 Shin-Kawasaki Twin Tower WEST TOWER 16F Kawasaki-shi Saiwai-ku Kanagawa JP 212-0058
Country🇯🇵 Japan
RegisteredAug 7, 2026
Block range8C:1F:64:16:80:00– 8C:1F:64:16:8F: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
Previous
8C:1F:64:16:60:00 /36
Hikari Alphax Inc.
Next
8C:1F:64:16:90:00 /36
Creative Telecom Pvt. Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
JAPAN ID Co., Ltd. holds 1 registered blocks in the IEEE registry, ranking #17,013 of 33,427 organizations by block count.