MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix10:63:A3:70:00:00 /28
Vendor addressFujisirominami3-11-2 Toride Ibaraki JP 300-1516
Country🇯🇵 Japan
RegisteredApr 4, 2024
Block range10:63:A3:70:00:00– 10:63:A3:7F:FF:FF
Address capacity1,048,576
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
10:63:A3:60:00:00 /28
Morgan Schaffer
Next
10:63:A3:80:00:00 /28
Shanghai Kanghai Information System CO.,LTD.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
NRS Co., Ltd. holds 1 registered blocks in the IEEE registry, ranking #21,661 of 33,421 organizations by block count.