EM Microelectronic (78:5F:28:00:00:00 /24)

EM Microelectronic MA-L

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

Prefix78:5F:28:00:00:00 /24

Vendor addressRue des Sors 3 Marin-Epagnier Neuchatel CH 2074

Block range78:5F:28:00:00:00– 78:5F:28: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

78:5F:28:00:00:00 78:5F:28:7F:FF:FF 78:5F:28:FF:FF:FF

Other blocks registered to EM Microelectronic

08:73:6F:00:00:00 /24 MA-L 08:CE:94:00:00:00 /24 MA-L 0C:F3:EE:00:00:00 /24 MA-L 10:9D:9C:00:00:00 /24 MA-L 18:32:19:00:00:00 /24 MA-L 28:E9:71:00:00:00 /24 MA-L 2C:AB:EE:00:00:00 /24 MA-L 2C:DC:C1:00:00:00 /24 MA-L 34:5B:98:00:00:00 /24 MA-L 40:69:18:00:00:00 /24 MA-L 44:38:F3:00:00:00 /24 MA-L 44:45:20:00:00:00 /24 MA-L