MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix70:B3:D5:5A:90:00 /36
Vendor address644-1 Tenjingoe,Ooaza-Kamiishizuka Oyama Tochigi JP 323-0063
Country🇯🇵 Japan
RegisteredApr 12, 2015
Block range70:B3:D5:5A:90:00– 70:B3:D5:5A:9F: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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70:B3:D5:5A:80:00 /36
Farmobile, LLC
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70:B3:D5:5A:A0:00 /36
Chugoku Electric Manufacturing Co.,Inc
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Bunka Shutter Co., Ltd. holds 3 registered blocks in the IEEE registry, ranking #949 of 33,421 organizations by block count.
Other blocks registered to Bunka Shutter Co., Ltd.