macadress

Tecvan Informatica Ltda

MA-L
MA-L: a full /24 OUI block, IEEE's largest, covering 16,777,216 addresses.
Prefix00:1D:5B:00:00:00 /24
Vendor addressRua Guaicurus, 145 Diadema São Paulo BR 09911-630
Country🇧🇷  Brazil
RegisteredAug 18, 2007
Block range00:1D:5B:00:00:00– 00:1D:5B: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. Aug 18, 2007 – Nov 29, 2012 Tecvan Informatica Ltda name changedaddress changed
  2. Nov 29, 2012 – Aug 27, 2015 Tecvan Informática Ltda name changedaddress changed
  3. Aug 27, 2015 – Jul 28, 2021 Tecvan Informática Ltda name changed
  4. Jul 28, 2021 – present Tecvan Informatica Ltda

Example addresses in this block

00:1D:5B:00:00:00 00:1D:5B:7F:FF:FF 00:1D:5B:FF:FF:FF

Where this block sits

Previous 00:1D:5A:00:00:00 /24 2Wire Inc Next 00:1D:5C:00:00:00 /24 Tom Communication Industrial Co.,Ltd.

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

Tecvan Informatica Ltda holds 1 registered blocks in the IEEE registry, ranking #29,443 of 33,421 organizations by block count.