MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix70:B3:D5:3E:80:00 /36
Vendor address5-4-1 Kuryu Aoba-ku Sendai-shi Miyagi JP 989-3122
Country🇯🇵 Japan
RegisteredSep 11, 2016
Block range70:B3:D5:3E:80:00– 70:B3:D5:3E: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
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70:B3:D5:3E:70:00 /36
JNR Sports Holdings, LLC
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70:B3:D5:3E:90:00 /36
APOLLO GIKEN Co.,Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
COSMOS web Co., Ltd. holds 1 registered blocks in the IEEE registry, ranking #9,267 of 33,421 organizations by block count.