Which company owns MAC address prefix 14:1A:51?

MAC address prefix 14:1A:51 is registered to Treetech Sistemas Digitais in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 14:1A:51 has a network interface built by Treetech Sistemas Digitais.

What is the OUI 14:1A:51?

14:1A:51 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Treetech Sistemas Digitais. It covers every address from 14:1A:51:00:00:00 to 14:1A:51:FF:FF:FF, or 16,777,216 addresses in total. It is also written 14-1A-51.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 14:1A:51:00:00:00 that is 14:1A:51 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.

Where is Treetech Sistemas Digitais located?

Treetech Sistemas Digitais is listed at Praca Claudino Alves, 141 Atibaia São Paulo BR 12940-800 in the IEEE OUI registry entry for 14:1A:51. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Treetech Sistemas Digitais

MAC address prefix 14:1A:51 is registered to Treetech Sistemas Digitais in the IEEE OUI registry. Any device whose MAC address begins with 14:1A:51 has a network interface built by Treetech Sistemas Digitais. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address — it covers every MAC from 14:1A:51:00:00:00 to 14:1A:51:FF:FF:FF.

OUI prefix: 14:1A:51
Hyphen form: 14-1A-51
MAC range: 14:1A:51:00:00:00 – 14:1A:51:FF:FF:FF
Addresses in block: 16,777,216
Organization: Treetech Sistemas Digitais
Address: Praca Claudino Alves, 141 Atibaia São Paulo BR 12940-800
Source: IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2016-07-29Assigned to "Treetech Sistemas Digitais"
archived source →
2026-07-17Assigned to "Treetech Sistemas Digitais"

Nearby in the registry

The prefixes assigned immediately before and after 14:1A:51:

FAQ

Which company owns MAC address prefix 14:1A:51?: MAC address prefix 14:1A:51 is registered to Treetech Sistemas Digitais in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 14:1A:51 has a network interface built by Treetech Sistemas Digitais.
What is the OUI 14:1A:51?: 14:1A:51 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Treetech Sistemas Digitais. It covers every address from 14:1A:51:00:00:00 to 14:1A:51:FF:FF:FF, or 16,777,216 addresses in total. It is also written 14-1A-51.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 14:1A:51:00:00:00 that is 14:1A:51 — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.
Where is Treetech Sistemas Digitais located?: Treetech Sistemas Digitais is listed at Praca Claudino Alves, 141 Atibaia São Paulo BR 12940-800 in the IEEE OUI registry entry for 14:1A:51. This is the address the organization registered with the IEEE, which may differ from its current operating address.