Which company owns MAC address prefix C0:F1:C4?

MAC address prefix C0:F1:C4 is registered to Pacidal Corporation Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C0:F1:C4 has a network interface built by Pacidal Corporation Ltd..

What is the OUI C0:F1:C4?

C0:F1:C4 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Pacidal Corporation Ltd.. It covers every address from C0:F1:C4:00:00:00 to C0:F1:C4:FF:FF:FF, or 16,777,216 addresses in total. It is also written C0-F1-C4.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C0:F1:C4:00:00:00 that is C0:F1:C4 — 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 Pacidal Corporation Ltd. located?

Pacidal Corporation Ltd. is listed at 3F., No. 11, Aly 3, Ln. 123, Sec. 3 Ren'ai Rd. Taipei City TW 106 in the IEEE OUI registry entry for C0:F1:C4. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Pacidal Corporation Ltd.

MAC address prefix C0:F1:C4 is registered to Pacidal Corporation Ltd. in the IEEE OUI registry. Any device whose MAC address begins with C0:F1:C4 has a network interface built by Pacidal Corporation Ltd.. 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:F1:C4:00:00:00 to C0:F1:C4:FF:FF:FF.

OUI prefix: C0:F1:C4
Hyphen form: C0-F1-C4
MAC range: C0:F1:C4:00:00:00 – C0:F1:C4:FF:FF:FF
Addresses in block: 16,777,216
Organization: Pacidal Corporation Ltd.
Address: 3F., No. 11, Aly 3, Ln. 123, Sec. 3 Ren'ai Rd. Taipei City TW 106
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 "Pacidal Corporation Ltd."
archived source →
2026-07-17Assigned to "Pacidal Corporation Ltd."

Nearby in the registry

The prefixes assigned immediately before and after C0:F1:C4:

FAQ

Which company owns MAC address prefix C0:F1:C4?: MAC address prefix C0:F1:C4 is registered to Pacidal Corporation Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C0:F1:C4 has a network interface built by Pacidal Corporation Ltd..
What is the OUI C0:F1:C4?: C0:F1:C4 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Pacidal Corporation Ltd.. It covers every address from C0:F1:C4:00:00:00 to C0:F1:C4:FF:FF:FF, or 16,777,216 addresses in total. It is also written C0-F1-C4.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C0:F1:C4:00:00:00 that is C0:F1:C4 — 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 Pacidal Corporation Ltd. located?: Pacidal Corporation Ltd. is listed at 3F., No. 11, Aly 3, Ln. 123, Sec. 3 Ren'ai Rd. Taipei City TW 106 in the IEEE OUI registry entry for C0:F1:C4. This is the address the organization registered with the IEEE, which may differ from its current operating address.