Golmar Sistemas de Comunicacion SA

MA-L

MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.

Prefix2C:91:EF:00:00:00 /24

Vendor addressSilici 13 Cornella de Llobregat Barcelona ES 08940

Block range2C:91:EF:00:00:00– 2C:91:EF: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.

Curious how a prefix like this turns into a full address? See how MAC addresses are structured →

Example addresses in this block

2C:91:EF:00:00:00 2C:91:EF:7F:FF:FF 2C:91:EF:FF:FF:FF

Where this block sits

Golmar Sistemas de Comunicacion SA holds 1 registered blocks in the IEEE registry, ranking #13,849 of 33,421 organizations by block count.