MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix70:B3:D5:56:B0:00 /36
Vendor address59 Nirayama Tada Izunokuni Shizuoka JP 4102133
Country🇯🇵 Japan
RegisteredApr 16, 2017
Block range70:B3:D5:56:B0:00– 70:B3:D5:56:BF: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.
S.E.I. CO.,LTD. holds 4 registered blocks in the IEEE registry, ranking #805 of 33,421 organizations by block count.
Other blocks registered to S.E.I. CO.,LTD.