MA-M: a /28 block, one IEEE assigns within a larger OUI when a full /24 isn't needed, covering 1,048,576 addresses.
Prefix04:58:5D:30:00:00 /28
Vendor address"Mads-Clausen-Str. 7 Flensburg Schleswig-Holstein DE 24939
Country🇩🇪 Germany
RegisteredMay 28, 2025
Block range04:58:5D:30:00:00– 04:58:5D:3F: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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04:58:5D:20:00:00 /28
Foxconn Brasil Industria e Comercio Ltda
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04:58:5D:40:00:00 /28
Integrated Technical Vision Ltd
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
REXXON GmbH holds 2 registered blocks in the IEEE registry, ranking #2,846 of 33,427 organizations by block count.
Other blocks registered to REXXON GmbH