MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix64:62:66:50:00:00 /28
Vendor addressGupfenstrasse 5 Uzwil CH 9240
Country🇨🇭 Switzerland
RegisteredDec 18, 2019
Block range64:62:66:50:00:00– 64:62:66:5F: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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64:62:66:40:00:00 /28
Redstone Systems, Inc.
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64:62:66:60:00:00 /28
Pass & Seymour, Inc d/b/a Legrand
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Bühler AG holds 1 registered blocks in the IEEE registry, ranking #6,223 of 33,421 organizations by block count.