CERN

MA-L

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

Prefix08:00:30:00:00:00 /24

Vendor addressCH-1211 GENEVE SUISSE/SWITZ CH 023

RegisteredApr 22, 1998

Block range08:00:30:00:00:00– 08:00:30: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

08:00:30:00:00:00 08:00:30:7F:FF:FF 08:00:30:FF:FF:FF

Where this block sits

Previous 08:00:2F:00:00:00 /24 PRIME COMPUTER INC. Next 08:00:31:00:00:00 /24 LITTLE MACHINES INC.

The nearest registered blocks of the same size on either side of this one in IEEE's address space.

CERN holds 2 registered blocks in the IEEE registry, ranking #1,707 of 33,421 organizations by block count.

Other blocks registered to CERN

80:D3:36:00:00:00 /24 MA-L