BROWN'S OPERATING SYSTEM SERVICES, LTD.

MA-L

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

Prefix00:20:9E:00:00:00 /24

Vendor addressST. AGNES HOUSE, CRESSWELL PK, BLACKHEATH, London SE3 9RD GB

RegisteredApr 22, 1998

Block range00:20:9E:00:00:00– 00:20:9E: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

Apr 22, 1998 – Jun 5, 2002 BROWN'S OPERATING SYSTEM name changedaddress changed
Jun 5, 2002 – present BROWN'S OPERATING SYSTEM SERVICES, LTD.

Example addresses in this block

00:20:9E:00:00:00 00:20:9E:7F:FF:FF 00:20:9E:FF:FF:FF

Where this block sits

Previous 00:20:9D:00:00:00 /24 LIPPERT AUTOMATIONSTECHNIK Next 00:20:9F:00:00:00 /24 MERCURY COMPUTER SYSTEMS, INC.

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

BROWN'S OPERATING SYSTEM SERVICES, LTD. holds 1 registered blocks in the IEEE registry, ranking #7,473 of 33,421 organizations by block count.