Which company owns MAC address prefix F4:CA:24?

MAC address prefix F4:CA:24 is registered to FreeBit Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F4:CA:24 has a network interface built by FreeBit Co., Ltd..

What is the OUI F4:CA:24?

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

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F4:CA:24:00:00:00 that is F4:CA:24 — 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 FreeBit Co., Ltd. located?

FreeBit Co., Ltd. is listed at E.Space Tower 3-6 Maruyama-Cho Shibuya-ku Tokyo JP 150-0044 in the IEEE OUI registry entry for F4:CA:24. This is the address the organization registered with the IEEE, which may differ from its current operating address.

FreeBit Co., Ltd.

MAC address prefix F4:CA:24 is registered to FreeBit Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with F4:CA:24 has a network interface built by FreeBit 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 F4:CA:24:00:00:00 to F4:CA:24:FF:FF:FF.

OUI prefix: F4:CA:24
Hyphen form: F4-CA-24
MAC range: F4:CA:24:00:00:00 – F4:CA:24:FF:FF:FF
Addresses in block: 16,777,216
Organization: FreeBit Co., Ltd.
Address: E.Space Tower 3-6 Maruyama-Cho Shibuya-ku Tokyo JP 150-0044
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 "FreeBit Co., Ltd."
archived source →
2026-07-17Assigned to "FreeBit Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after F4:CA:24:

FAQ

Which company owns MAC address prefix F4:CA:24?: MAC address prefix F4:CA:24 is registered to FreeBit Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F4:CA:24 has a network interface built by FreeBit Co., Ltd..
What is the OUI F4:CA:24?: F4:CA:24 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to FreeBit Co., Ltd.. It covers every address from F4:CA:24:00:00:00 to F4:CA:24:FF:FF:FF, or 16,777,216 addresses in total. It is also written F4-CA-24.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F4:CA:24:00:00:00 that is F4:CA:24 — 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 FreeBit Co., Ltd. located?: FreeBit Co., Ltd. is listed at E.Space Tower 3-6 Maruyama-Cho Shibuya-ku Tokyo JP 150-0044 in the IEEE OUI registry entry for F4:CA:24. This is the address the organization registered with the IEEE, which may differ from its current operating address.