Which company owns MAC address prefix C4:F4:64?

MAC address prefix C4:F4:64 is registered to Spica international in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:F4:64 has a network interface built by Spica international.

What is the OUI C4:F4:64?

C4:F4:64 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Spica international. It covers every address from C4:F4:64:00:00:00 to C4:F4:64:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-F4-64.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C4:F4:64:00:00:00 that is C4:F4:64 — 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 Spica international located?

Spica international is listed at Pot k sejmiscu 33 Ljubljana SI 1000 in the IEEE OUI registry entry for C4:F4:64. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Spica international

MAC address prefix C4:F4:64 is registered to Spica international in the IEEE OUI registry. Any device whose MAC address begins with C4:F4:64 has a network interface built by Spica international. 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:F4:64:00:00:00 to C4:F4:64:FF:FF:FF.

OUI prefix: C4:F4:64
Hyphen form: C4-F4-64
MAC range: C4:F4:64:00:00:00 – C4:F4:64:FF:FF:FF
Addresses in block: 16,777,216
Organization: Spica international
Address: Pot k sejmiscu 33 Ljubljana SI 1000
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 "Spica international"
archived source →
2026-07-17Assigned to "Spica international"

Nearby in the registry

The prefixes assigned immediately before and after C4:F4:64:

FAQ

Which company owns MAC address prefix C4:F4:64?: MAC address prefix C4:F4:64 is registered to Spica international in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C4:F4:64 has a network interface built by Spica international.
What is the OUI C4:F4:64?: C4:F4:64 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Spica international. It covers every address from C4:F4:64:00:00:00 to C4:F4:64:FF:FF:FF, or 16,777,216 addresses in total. It is also written C4-F4-64.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C4:F4:64:00:00:00 that is C4:F4:64 — 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 Spica international located?: Spica international is listed at Pot k sejmiscu 33 Ljubljana SI 1000 in the IEEE OUI registry entry for C4:F4:64. This is the address the organization registered with the IEEE, which may differ from its current operating address.