Which company owns MAC address prefix C0:8B:6F?

MAC address prefix C0:8B:6F is registered to S I Sistemas Inteligentes Eletrônicos Ltda in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C0:8B:6F has a network interface built by S I Sistemas Inteligentes Eletrônicos Ltda.

What is the OUI C0:8B:6F?

C0:8B:6F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to S I Sistemas Inteligentes Eletrônicos Ltda. It covers every address from C0:8B:6F:00:00:00 to C0:8B:6F:FF:FF:FF, or 16,777,216 addresses in total. It is also written C0-8B-6F.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C0:8B:6F:00:00:00 that is C0:8B:6F — 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 S I Sistemas Inteligentes Eletrônicos Ltda located?

S I Sistemas Inteligentes Eletrônicos Ltda is listed at Rua Amadeu Piotto 161 Curitiba Paraná BR 81280020 in the IEEE OUI registry entry for C0:8B:6F. This is the address the organization registered with the IEEE, which may differ from its current operating address.

S I Sistemas Inteligentes Eletrônicos Ltda

MAC address prefix C0:8B:6F is registered to S I Sistemas Inteligentes Eletrônicos Ltda in the IEEE OUI registry. Any device whose MAC address begins with C0:8B:6F has a network interface built by S I Sistemas Inteligentes Eletrônicos 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 C0:8B:6F:00:00:00 to C0:8B:6F:FF:FF:FF.

OUI prefix: C0:8B:6F
Hyphen form: C0-8B-6F
MAC range: C0:8B:6F:00:00:00 – C0:8B:6F:FF:FF:FF
Addresses in block: 16,777,216
Organization: S I Sistemas Inteligentes Eletrônicos Ltda
Address: Rua Amadeu Piotto 161 Curitiba Paraná BR 81280020
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 "S I Sistemas Inteligentes Eletrônicos Ltda"
archived source →
2026-07-17Assigned to "S I Sistemas Inteligentes Eletrônicos Ltda"

Nearby in the registry

The prefixes assigned immediately before and after C0:8B:6F:

FAQ

Which company owns MAC address prefix C0:8B:6F?: MAC address prefix C0:8B:6F is registered to S I Sistemas Inteligentes Eletrônicos Ltda in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C0:8B:6F has a network interface built by S I Sistemas Inteligentes Eletrônicos Ltda.
What is the OUI C0:8B:6F?: C0:8B:6F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to S I Sistemas Inteligentes Eletrônicos Ltda. It covers every address from C0:8B:6F:00:00:00 to C0:8B:6F:FF:FF:FF, or 16,777,216 addresses in total. It is also written C0-8B-6F.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C0:8B:6F:00:00:00 that is C0:8B:6F — 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 S I Sistemas Inteligentes Eletrônicos Ltda located?: S I Sistemas Inteligentes Eletrônicos Ltda is listed at Rua Amadeu Piotto 161 Curitiba Paraná BR 81280020 in the IEEE OUI registry entry for C0:8B:6F. This is the address the organization registered with the IEEE, which may differ from its current operating address.