MA-S: a /36 block (also called an OUI-36 assignment), IEEE's smallest, covering 4,096 addresses.
Prefix8C:1F:64:64:00:00 /36
Vendor addressRoute de la Chapelle 1 Grand-Lancy Genève CH 1212
Country🇨🇭 Switzerland
RegisteredApr 16, 2026
Block range8C:1F:64:64:00:00– 8C:1F:64:64:0F: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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8C:1F:64:63:F0:00 /36
PREO INDUSTRIES FAR EAST LTD
Next
8C:1F:64:64:10:00 /36
biosilver .co.,ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Transports Publics Genevois holds 1 registered blocks in the IEEE registry, ranking #30,437 of 33,427 organizations by block count.