MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix90:F4:21:C0:00:00 /28
Vendor address91 rue du faubourg saint honore PARIS PARIS FR 75008
Country🇫🇷 France
RegisteredMar 12, 2023
Block range90:F4:21:C0:00:00– 90:F4:21:CF: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
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90:F4:21:B0:00:00 /28
Jiangsu MSInfo Technology Co.,Ltd.
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90:F4:21:D0:00:00 /28
Taichitel Technology Shanghai Co.,Ltd.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
ACOBA holds 1 registered blocks in the IEEE registry, ranking #3,927 of 33,427 organizations by block count.