macadress

First International Computer do Brasil

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:12:9D:00:00:00 /24
Vendor addressRodovia BR 459 Santa Rita do Sapucaí Minas Gerais BR
Country🇧🇷  Brazil
RegisteredOct 16, 2004
Block range00:12:9D:00:00:00– 00:12:9D: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. Oct 16, 2004 – Dec 31, 2007 FIRST INTERNATIONAL COMPUTER DO BRASIL LTDA name changedaddress changed
  2. Dec 31, 2007 – present First International Computer do Brasil

Example addresses in this block

00:12:9D:00:00:00 00:12:9D:7F:FF:FF 00:12:9D:FF:FF:FF

Where this block sits

Previous 00:12:9C:00:00:00 /24 Yulinet Next 00:12:9E:00:00:00 /24 Surf Communications Inc.

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

First International Computer do Brasil holds 1 registered blocks in the IEEE registry, ranking #12,741 of 33,427 organizations by block count.