macadress

Micro Research Ltd.

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:10:38:00:00:00 /24
Vendor address2F Minami-Shinagawa N Bldg., 2-2-10 Minami-Shinagawa Tokyo Shinagawa-Ku JP 140-0004
Country🇯🇵  Japan
RegisteredApr 22, 1998
Block range00:10:38:00:00:00– 00:10:38: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

  1. Apr 22, 1998 – Oct 5, 2019 MICRO RESEARCH INSTITUTE, INC. name changedaddress changed
  2. Oct 5, 2019 – present Micro Research Ltd.

Example addresses in this block

00:10:38:00:00:00 00:10:38:7F:FF:FF 00:10:38:FF:FF:FF

Where this block sits

Previous 00:10:37:00:00:00 /24 CYQ've Technology Co., Ltd. Next 00:10:39:00:00:00 /24 Vectron Systems AG

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

Micro Research Ltd. holds 1 registered blocks in the IEEE registry, ranking #19,784 of 33,427 organizations by block count.