MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
PrefixC0:18:8C:00:00:00 /24
Vendor addressAv. Theodomiro Porto da Fonseca, 3101 - lote 01 - Cristo Rei São Leopoldo Rio Grande do Sul BR 93022-715
Country🇧🇷 Brazil
RegisteredNov 19, 2025
Block rangeC0:18:8C:00:00:00– C0:18:8C:FF:FF:FF
Address capacity16,777,216
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.
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Example addresses in this block
Where this block sits
The nearest registered blocks of the same size on either side of this one in IEEE's address space.
Altus Sistemas de Automação S.A. holds 1 registered blocks in the IEEE registry, ranking #4,864 of 33,421 organizations by block count.