Arantia 2010 S.L. (A4:B1:21:00:00:00 /24)

Arantia 2010 S.L. MA-L

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

PrefixA4:B1:21:00:00:00 /24

Vendor addressVolta do Castro s/n Santiago de Compostela A Coruña ES 15706

Block rangeA4:B1:21:00:00:00– A4:B1:21: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

A4:B1:21:00:00:00 A4:B1:21:7F:FF:FF A4:B1:21:FF:FF:FF