Which company owns MAC address prefix 54:C9:DF?

MAC address prefix 54:C9:DF is registered to FN-LINK TECHNOLOGY LIMITED in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 54:C9:DF has a network interface built by FN-LINK TECHNOLOGY LIMITED.

What is the OUI 54:C9:DF?

54:C9:DF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to FN-LINK TECHNOLOGY LIMITED. It covers every address from 54:C9:DF:00:00:00 to 54:C9:DF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 54-C9-DF.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 54:C9:DF:00:00:00 that is 54:C9:DF — 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 LIMITED located?

FN-LINK TECHNOLOGY LIMITED is listed at A Building,HuiXin industial park,No 31, YongHe road, Fuyong town, Bao'an District SHENZHEN GUANGDONG CN 518100 in the IEEE OUI registry entry for 54:C9:DF. 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 LIMITED own?

FN-LINK TECHNOLOGY LIMITED holds 21 OUI prefixes in the IEEE registry, of which 54:C9:DF is one. A device made by FN-LINK TECHNOLOGY LIMITED could carry a MAC address from any of them.

FN-LINK TECHNOLOGY LIMITED

MAC address prefix 54:C9:DF is registered to FN-LINK TECHNOLOGY LIMITED in the IEEE OUI registry. Any device whose MAC address begins with 54:C9:DF has a network interface built by FN-LINK TECHNOLOGY LIMITED. 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 54:C9:DF:00:00:00 to 54:C9:DF:FF:FF:FF.

OUI prefix: 54:C9:DF
Hyphen form: 54-C9-DF
MAC range: 54:C9:DF:00:00:00 – 54:C9:DF:FF:FF:FF
Addresses in block: 16,777,216
Organization: FN-LINK TECHNOLOGY LIMITED
Address: A Building,HuiXin industial park,No 31, YongHe road, Fuyong town, Bao'an District SHENZHEN GUANGDONG CN 518100
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 LIMITED

FN-LINK TECHNOLOGY LIMITED holds 21 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.

2017-09-08Assigned to "FN-LINK TECHNOLOGY LIMITED"
archived source →
2026-07-17Assigned to "FN-LINK TECHNOLOGY LIMITED"

Nearby in the registry

The prefixes assigned immediately before and after 54:C9:DF:

FAQ

Which company owns MAC address prefix 54:C9:DF?: MAC address prefix 54:C9:DF is registered to FN-LINK TECHNOLOGY LIMITED in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 54:C9:DF has a network interface built by FN-LINK TECHNOLOGY LIMITED.
What is the OUI 54:C9:DF?: 54:C9:DF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to FN-LINK TECHNOLOGY LIMITED. It covers every address from 54:C9:DF:00:00:00 to 54:C9:DF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 54-C9-DF.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 54:C9:DF:00:00:00 that is 54:C9:DF — 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 LIMITED located?: FN-LINK TECHNOLOGY LIMITED is listed at A Building,HuiXin industial park,No 31, YongHe road, Fuyong town, Bao'an District SHENZHEN GUANGDONG CN 518100 in the IEEE OUI registry entry for 54:C9:DF. 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 LIMITED own?: FN-LINK TECHNOLOGY LIMITED holds 21 OUI prefixes in the IEEE registry, of which 54:C9:DF is one. A device made by FN-LINK TECHNOLOGY LIMITED could carry a MAC address from any of them.