Which company owns MAC address prefix FC:F1:CD?

MAC address prefix FC:F1:CD is registered to OPTEX-FA CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with FC:F1:CD has a network interface built by OPTEX-FA CO.,LTD..

What is the OUI FC:F1:CD?

FC:F1:CD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to OPTEX-FA CO.,LTD.. It covers every address from FC:F1:CD:00:00:00 to FC:F1:CD:FF:FF:FF, or 16,777,216 addresses in total. It is also written FC-F1-CD.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in FC:F1:CD:00:00:00 that is FC:F1:CD — 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 OPTEX-FA CO.,LTD. located?

OPTEX-FA CO.,LTD. is listed at 91 Awata-cho Kyoto JP 600-8815 in the IEEE OUI registry entry for FC:F1:CD. This is the address the organization registered with the IEEE, which may differ from its current operating address.

OPTEX-FA CO.,LTD.

MAC address prefix FC:F1:CD is registered to OPTEX-FA CO.,LTD. in the IEEE OUI registry. Any device whose MAC address begins with FC:F1:CD has a network interface built by OPTEX-FA CO.,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 FC:F1:CD:00:00:00 to FC:F1:CD:FF:FF:FF.

OUI prefix: FC:F1:CD
Hyphen form: FC-F1-CD
MAC range: FC:F1:CD:00:00:00 – FC:F1:CD:FF:FF:FF
Addresses in block: 16,777,216
Organization: OPTEX-FA CO.,LTD.
Address: 91 Awata-cho Kyoto JP 600-8815
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 "OPTEX-FA CO.,LTD."
archived source →
2026-07-17Assigned to "OPTEX-FA CO.,LTD."

Nearby in the registry

The prefixes assigned immediately before and after FC:F1:CD:

FAQ

Which company owns MAC address prefix FC:F1:CD?: MAC address prefix FC:F1:CD is registered to OPTEX-FA CO.,LTD. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with FC:F1:CD has a network interface built by OPTEX-FA CO.,LTD..
What is the OUI FC:F1:CD?: FC:F1:CD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to OPTEX-FA CO.,LTD.. It covers every address from FC:F1:CD:00:00:00 to FC:F1:CD:FF:FF:FF, or 16,777,216 addresses in total. It is also written FC-F1-CD.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in FC:F1:CD:00:00:00 that is FC:F1:CD — 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 OPTEX-FA CO.,LTD. located?: OPTEX-FA CO.,LTD. is listed at 91 Awata-cho Kyoto JP 600-8815 in the IEEE OUI registry entry for FC:F1:CD. This is the address the organization registered with the IEEE, which may differ from its current operating address.