ART System Co., Ltd.

MA-L

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

Prefix00:21:CA:00:00:00 /24

Vendor addressMobile Techno Bldg Room 910 Dae-Gu KR 702-020

RegisteredJun 18, 2008

Block range00:21:CA:00:00:00– 00:21:CA: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

00:21:CA:00:00:00 00:21:CA:7F:FF:FF 00:21:CA:FF:FF:FF

Where this block sits

Previous 00:21:C9:00:00:00 /24 Wavecom Asia Pacific Limited Next 00:21:CB:00:00:00 /24 SMS TECNOLOGIA ELETRONICA LTDA

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

ART System Co., Ltd. holds 1 registered blocks in the IEEE registry, ranking #5,507 of 33,421 organizations by block count.