Which company owns MAC address prefix 54:1D:FB?

MAC address prefix 54:1D:FB is registered to Freestyle Energy Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 54:1D:FB has a network interface built by Freestyle Energy Ltd.

What is the OUI 54:1D:FB?

54:1D:FB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Freestyle Energy Ltd. It covers every address from 54:1D:FB:00:00:00 to 54:1D:FB:FF:FF:FF, or 16,777,216 addresses in total. It is also written 54-1D-FB.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 54:1D:FB:00:00:00 that is 54:1D:FB — 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 Freestyle Energy Ltd located?

Freestyle Energy Ltd is listed at 18-24 Ricketts Road Mount Waverley Victoria AU 3149 in the IEEE OUI registry entry for 54:1D:FB. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Freestyle Energy Ltd

MAC address prefix 54:1D:FB is registered to Freestyle Energy Ltd in the IEEE OUI registry. Any device whose MAC address begins with 54:1D:FB has a network interface built by Freestyle Energy 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 54:1D:FB:00:00:00 to 54:1D:FB:FF:FF:FF.

OUI prefix: 54:1D:FB
Hyphen form: 54-1D-FB
MAC range: 54:1D:FB:00:00:00 – 54:1D:FB:FF:FF:FF
Addresses in block: 16,777,216
Organization: Freestyle Energy Ltd
Address: 18-24 Ricketts Road Mount Waverley Victoria AU 3149
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 "Freestyle Energy Ltd"
archived source →
2026-07-17Assigned to "Freestyle Energy Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 54:1D:FB:

FAQ

Which company owns MAC address prefix 54:1D:FB?: MAC address prefix 54:1D:FB is registered to Freestyle Energy Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 54:1D:FB has a network interface built by Freestyle Energy Ltd.
What is the OUI 54:1D:FB?: 54:1D:FB is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Freestyle Energy Ltd. It covers every address from 54:1D:FB:00:00:00 to 54:1D:FB:FF:FF:FF, or 16,777,216 addresses in total. It is also written 54-1D-FB.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 54:1D:FB:00:00:00 that is 54:1D:FB — 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 Freestyle Energy Ltd located?: Freestyle Energy Ltd is listed at 18-24 Ricketts Road Mount Waverley Victoria AU 3149 in the IEEE OUI registry entry for 54:1D:FB. This is the address the organization registered with the IEEE, which may differ from its current operating address.