MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix70:B3:D5:4D:C0:00 /36
Vendor addressRYOGOKU 4-35-1-304 SUMIDA-KU TOKYO JP 1300026
Country🇯🇵 Japan
RegisteredJan 18, 2015
Block range70:B3:D5:4D:C0:00– 70:B3:D5:4D:CF: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.
JK DEVICE CORPORATION holds 1 registered blocks in the IEEE registry, ranking #17,218 of 33,427 organizations by block count.