Which company owns MAC address prefix AC:02:CF?

MAC address prefix AC:02:CF is registered to RW Tecnologia Industria e Comercio Ltda in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:02:CF has a network interface built by RW Tecnologia Industria e Comercio Ltda.

What is the OUI AC:02:CF?

AC:02:CF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to RW Tecnologia Industria e Comercio Ltda. It covers every address from AC:02:CF:00:00:00 to AC:02:CF:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-02-CF.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in AC:02:CF:00:00:00 that is AC:02:CF — 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 RW Tecnologia Industria e Comercio Ltda located?

RW Tecnologia Industria e Comercio Ltda is listed at Centro Empresarial Paulo Frederico de Toledo, 80 A Santa Rita do Sapucai Minas Gerais BR 37540000 in the IEEE OUI registry entry for AC:02:CF. This is the address the organization registered with the IEEE, which may differ from its current operating address.

RW Tecnologia Industria e Comercio Ltda

MAC address prefix AC:02:CF is registered to RW Tecnologia Industria e Comercio Ltda in the IEEE OUI registry. Any device whose MAC address begins with AC:02:CF has a network interface built by RW Tecnologia Industria e Comercio Ltda. 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 AC:02:CF:00:00:00 to AC:02:CF:FF:FF:FF.

OUI prefix: AC:02:CF
Hyphen form: AC-02-CF
MAC range: AC:02:CF:00:00:00 – AC:02:CF:FF:FF:FF
Addresses in block: 16,777,216
Organization: RW Tecnologia Industria e Comercio Ltda
Address: Centro Empresarial Paulo Frederico de Toledo, 80 A Santa Rita do Sapucai Minas Gerais BR 37540000
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 "RW Tecnologia Industria e Comercio Ltda"
archived source →
2026-07-17Assigned to "RW Tecnologia Industria e Comercio Ltda"

Nearby in the registry

The prefixes assigned immediately before and after AC:02:CF:

FAQ

Which company owns MAC address prefix AC:02:CF?: MAC address prefix AC:02:CF is registered to RW Tecnologia Industria e Comercio Ltda in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:02:CF has a network interface built by RW Tecnologia Industria e Comercio Ltda.
What is the OUI AC:02:CF?: AC:02:CF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to RW Tecnologia Industria e Comercio Ltda. It covers every address from AC:02:CF:00:00:00 to AC:02:CF:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-02-CF.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in AC:02:CF:00:00:00 that is AC:02:CF — 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 RW Tecnologia Industria e Comercio Ltda located?: RW Tecnologia Industria e Comercio Ltda is listed at Centro Empresarial Paulo Frederico de Toledo, 80 A Santa Rita do Sapucai Minas Gerais BR 37540000 in the IEEE OUI registry entry for AC:02:CF. This is the address the organization registered with the IEEE, which may differ from its current operating address.