Chinasys Technologies Limited

MA-L

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

Prefix00:12:0B:00:00:00 /24

Vendor address10/F,CAGW Building,No.30 Haidian South Road Beijing CN 100080

RegisteredAug 4, 2004

Block range00:12:0B:00:00:00– 00:12:0B: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

00:12:0B:00:00:00 00:12:0B:7F:FF:FF 00:12:0B:FF:FF:FF

Where this block sits

Previous 00:12:0A:00:00:00 /24 Emerson Climate Technologies GmbH Next 00:12:0C:00:00:00 /24 CE-Infosys Pte Ltd

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

Chinasys Technologies Limited holds 1 registered blocks in the IEEE registry, ranking #8,336 of 33,421 organizations by block count.