Which company owns MAC address prefix 40:F4:C9?

MAC address prefix 40:F4:C9 is registered to FN-LINK TECHNOLOGY Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:F4:C9 has a network interface built by FN-LINK TECHNOLOGY Ltd..

What is the OUI 40:F4:C9?

40:F4:C9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to FN-LINK TECHNOLOGY Ltd.. It covers every address from 40:F4:C9:00:00:00 to 40:F4:C9:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-F4-C9.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 40:F4:C9:00:00:00 that is 40:F4:C9 — 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 FN-LINK TECHNOLOGY Ltd. located?

FN-LINK TECHNOLOGY Ltd. is listed at No.8, Litong Road, Liuyang Economic & Technical Development Zone, Changsha, Hunan,China Changsha Hunan CN 410329 in the IEEE OUI registry entry for 40:F4:C9. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does FN-LINK TECHNOLOGY Ltd. own?

FN-LINK TECHNOLOGY Ltd. holds 20 OUI prefixes in the IEEE registry, of which 40:F4:C9 is one. A device made by FN-LINK TECHNOLOGY Ltd. could carry a MAC address from any of them.

FN-LINK TECHNOLOGY Ltd.

MAC address prefix 40:F4:C9 is registered to FN-LINK TECHNOLOGY Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 40:F4:C9 has a network interface built by FN-LINK TECHNOLOGY 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 40:F4:C9:00:00:00 to 40:F4:C9:FF:FF:FF.

OUI prefix: 40:F4:C9
Hyphen form: 40-F4-C9
MAC range: 40:F4:C9:00:00:00 – 40:F4:C9:FF:FF:FF
Addresses in block: 16,777,216
Organization: FN-LINK TECHNOLOGY Ltd.
Address: No.8, Litong Road, Liuyang Economic & Technical Development Zone, Changsha, Hunan,China Changsha Hunan CN 410329
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.

Other prefixes from FN-LINK TECHNOLOGY Ltd.

FN-LINK TECHNOLOGY Ltd. holds 20 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2024-06-23Assigned to "FN-LINK TECHNOLOGY Ltd."
archived source →
2026-07-17Assigned to "FN-LINK TECHNOLOGY Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 40:F4:C9:

FAQ

Which company owns MAC address prefix 40:F4:C9?: MAC address prefix 40:F4:C9 is registered to FN-LINK TECHNOLOGY Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:F4:C9 has a network interface built by FN-LINK TECHNOLOGY Ltd..
What is the OUI 40:F4:C9?: 40:F4:C9 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to FN-LINK TECHNOLOGY Ltd.. It covers every address from 40:F4:C9:00:00:00 to 40:F4:C9:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-F4-C9.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 40:F4:C9:00:00:00 that is 40:F4:C9 — 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 FN-LINK TECHNOLOGY Ltd. located?: FN-LINK TECHNOLOGY Ltd. is listed at No.8, Litong Road, Liuyang Economic & Technical Development Zone, Changsha, Hunan,China Changsha Hunan CN 410329 in the IEEE OUI registry entry for 40:F4:C9. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does FN-LINK TECHNOLOGY Ltd. own?: FN-LINK TECHNOLOGY Ltd. holds 20 OUI prefixes in the IEEE registry, of which 40:F4:C9 is one. A device made by FN-LINK TECHNOLOGY Ltd. could carry a MAC address from any of them.