Complementary Technologies Ltd

MA-L

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

Prefix00:05:11:00:00:00 /24

Vendor addressComtech House, 28 Manchester Road GB BL5 3QJ

RegisteredFeb 2, 2001

Block range00:05:11:00:00:00– 00:05:11: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 →

Ownership timeline

Feb 2, 2001 – Jun 5, 2002 Complementaty Technologies Ltd name changed
Jun 5, 2002 – present Complementary Technologies Ltd

Example addresses in this block

00:05:11:00:00:00 00:05:11:7F:FF:FF 00:05:11:FF:FF:FF

Where this block sits

Previous 00:05:10:00:00:00 /24 Infinite Shanghai Communication Terminals Ltd. Next 00:05:12:00:00:00 /24 Zebra Technologies Inc

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

Complementary Technologies Ltd holds 1 registered blocks in the IEEE registry, ranking #8,893 of 33,421 organizations by block count.