CENTRAL SYSTEM RESEARCH CO., LTD.

MA-L

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

Prefix00:90:ED:00:00:00 /24

Vendor address4-13-2 HIYOSHICHO KOKUBUNJI-CITY TOKYO 18500032 JP

RegisteredSep 8, 2000

Block range00:90:ED:00:00:00– 00:90:ED: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

Sep 8, 2000 – Jun 5, 2002 CENTRAL SYSTEM RESEARCH name changedaddress changedcountry changed
Jun 5, 2002 – present CENTRAL SYSTEM RESEARCH CO., LTD.

Example addresses in this block

00:90:ED:00:00:00 00:90:ED:7F:FF:FF 00:90:ED:FF:FF:FF

Where this block sits

Previous 00:90:EC:00:00:00 /24 PYRESCOM Next 00:90:EE:00:00:00 /24 PERSONAL COMMUNICATIONS TECHNOLOGIES

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

CENTRAL SYSTEM RESEARCH CO., LTD. holds 1 registered blocks in the IEEE registry, ranking #8,060 of 33,427 organizations by block count.