Which company owns MAC address prefix AC:CF:23?

MAC address prefix AC:CF:23 is registered to Hi-flying electronics technology Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:CF:23 has a network interface built by Hi-flying electronics technology Co.,Ltd.

What is the OUI AC:CF:23?

AC:CF:23 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Hi-flying electronics technology Co.,Ltd. It covers every address from AC:CF:23:00:00:00 to AC:CF:23:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-CF-23.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in AC:CF:23:00:00:00 that is AC:CF:23 — 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 Hi-flying electronics technology Co.,Ltd located?

Hi-flying electronics technology Co.,Ltd is listed at Room B101,456 BiBo Raod,PuDong Shanghai CN 201200 in the IEEE OUI registry entry for AC:CF:23. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Hi-flying electronics technology Co.,Ltd

MAC address prefix AC:CF:23 is registered to Hi-flying electronics technology Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with AC:CF:23 has a network interface built by Hi-flying electronics technology 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 AC:CF:23:00:00:00 to AC:CF:23:FF:FF:FF.

OUI prefix: AC:CF:23
Hyphen form: AC-CF-23
MAC range: AC:CF:23:00:00:00 – AC:CF:23:FF:FF:FF
Addresses in block: 16,777,216
Organization: Hi-flying electronics technology Co.,Ltd
Address: Room B101,456 BiBo Raod,PuDong Shanghai CN 201200
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 "Hi-flying electronics technology Co.,Ltd"
archived source →
2026-07-17Assigned to "Hi-flying electronics technology Co.,Ltd"

Nearby in the registry

The prefixes assigned immediately before and after AC:CF:23:

FAQ

Which company owns MAC address prefix AC:CF:23?: MAC address prefix AC:CF:23 is registered to Hi-flying electronics technology Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with AC:CF:23 has a network interface built by Hi-flying electronics technology Co.,Ltd.
What is the OUI AC:CF:23?: AC:CF:23 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Hi-flying electronics technology Co.,Ltd. It covers every address from AC:CF:23:00:00:00 to AC:CF:23:FF:FF:FF, or 16,777,216 addresses in total. It is also written AC-CF-23.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in AC:CF:23:00:00:00 that is AC:CF:23 — 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 Hi-flying electronics technology Co.,Ltd located?: Hi-flying electronics technology Co.,Ltd is listed at Room B101,456 BiBo Raod,PuDong Shanghai CN 201200 in the IEEE OUI registry entry for AC:CF:23. This is the address the organization registered with the IEEE, which may differ from its current operating address.