MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix64:FB:81:90:00:00 /28
Vendor address2 Fl., No. 282, Sec. 6, Zhongxiao E. Rd., Taipei TW 11558
Country🇹🇼 Taiwan
RegisteredOct 16, 2015
Block range64:FB:81:90:00:00– 64:FB:81:9F: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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64:FB:81:80:00:00 /28
NPG Technology S.A.
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64:FB:81:A0:00:00 /28
Bronkhorst High-Tech BV
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
hiQview Corporation holds 1 registered blocks in the IEEE registry, ranking #14,895 of 33,427 organizations by block count.