MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix50:19:11:D0:00:00 /28
Vendor addressNakacho 1-22-7 Musashino-shi Tokyo JP 1800006
Country🇯🇵 Japan
RegisteredJun 30, 2026
Block range50:19:11:D0:00:00– 50:19:11:DF: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.
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Example addresses in this block
Where this block sits
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50:19:11:C0:00:00 /28
J-Tech Digital, Inc
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50:19:11:E0:00:00 /28
Northrop Grumman Italia
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
MIKI KAIHATSU Co.,Ltd holds 1 registered blocks in the IEEE registry, ranking #19,926 of 33,427 organizations by block count.