OOO RUBEZH NPO (44:C3:9B:00:00:00 /24)

OOO RUBEZH NPO MA-L

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

Prefix44:C3:9B:00:00:00 /24

Vendor addressPionerskaya 11a Bratsk Irkutsk RU 665717

Block range44:C3:9B:00:00:00– 44:C3:9B: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

44:C3:9B:00:00:00 44:C3:9B:7F:FF:FF 44:C3:9B:FF:FF:FF