MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix08:3C:03:80:00:00 /28
Vendor addressPorschestrasse 11 Leverkusen DE 51381
Country🇩🇪 Germany
RegisteredJan 16, 2026
Block range08:3C:03:80:00:00– 08:3C:03:8F: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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08:3C:03:70:00:00 /28
G-Innovations Vietnam
Next
08:3C:03:90:00:00 /28
INNOS TECHNOLOGIES INC.
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
GS Industrie-Elektronik GmbH holds 3 registered blocks in the IEEE registry, ranking #1,073 of 33,421 organizations by block count.
Other blocks registered to GS Industrie-Elektronik GmbH