Which company owns MAC address prefix C4:F8:39?

MAC address prefix C4:F8:39 is registered to Actia Automotive in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:F8:39 has a network interface built by Actia Automotive.

What is the OUI C4:F8:39?

C4:F8:39 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Actia Automotive. It covers every address from C4:F8:39:00:00:00 to C4:F8:39:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-F8-39.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C4:F8:39:00:00:00 that is C4:F8:39 — 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 Actia Automotive located?

Actia Automotive is listed at 5 rue Jorge Semprun TOULOUSE FR 31400 in the IEEE OUI registry entry for C4:F8:39. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Actia Automotive

MAC address prefix C4:F8:39 is registered to Actia Automotive in the IEEE OUI registry. Any device whose MAC address begins with C4:F8:39 has a network interface built by Actia Automotive. 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 C4:F8:39:00:00:00 to C4:F8:39:FF:FF:FF.

OUI prefix: C4:F8:39
Hyphen form: C4-F8-39
MAC range: C4:F8:39:00:00:00 – C4:F8:39:FF:FF:FF
Addresses in block: 16,777,216
Organization: Actia Automotive
Address: 5 rue Jorge Semprun TOULOUSE FR 31400
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.

2018-12-21Assigned to "Actia Automotive"
archived source →
2026-07-17Assigned to "Actia Automotive"

Nearby in the registry

The prefixes assigned immediately before and after C4:F8:39:

FAQ

Which company owns MAC address prefix C4:F8:39?: MAC address prefix C4:F8:39 is registered to Actia Automotive in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:F8:39 has a network interface built by Actia Automotive.
What is the OUI C4:F8:39?: C4:F8:39 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Actia Automotive. It covers every address from C4:F8:39:00:00:00 to C4:F8:39:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-F8-39.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C4:F8:39:00:00:00 that is C4:F8:39 — 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 Actia Automotive located?: Actia Automotive is listed at 5 rue Jorge Semprun TOULOUSE FR 31400 in the IEEE OUI registry entry for C4:F8:39. This is the address the organization registered with the IEEE, which may differ from its current operating address.