Which company owns MAC address prefix A4:7E:FA?

MAC address prefix A4:7E:FA is registered to Withings in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:7E:FA has a network interface built by Withings.

What is the OUI A4:7E:FA?

A4:7E:FA is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Withings. It covers every address from A4:7E:FA:00:00:00 to A4:7E:FA:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-7E-FA.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A4:7E:FA:00:00:00 that is A4:7E:FA — 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 Withings located?

Withings is listed at 2 rue Maurice Hartmann Issy-les-Moulineaux FR 92130 in the IEEE OUI registry entry for A4:7E:FA. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Withings own?

Withings holds 2 OUI prefixes in the IEEE registry, of which A4:7E:FA is one. A device made by Withings could carry a MAC address from any of them.

Withings

MAC address prefix A4:7E:FA is registered to Withings in the IEEE OUI registry. Any device whose MAC address begins with A4:7E:FA has a network interface built by Withings. 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 A4:7E:FA:00:00:00 to A4:7E:FA:FF:FF:FF.

OUI prefix: A4:7E:FA
Hyphen form: A4-7E-FA
MAC range: A4:7E:FA:00:00:00 – A4:7E:FA:FF:FF:FF
Addresses in block: 16,777,216
Organization: Withings
Address: 2 rue Maurice Hartmann Issy-les-Moulineaux FR 92130
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 Withings

Withings holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

00:24:E4

Assignment history (2)

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

2022-07-11Assigned to "Withings"
archived source →
2026-07-17Assigned to "Withings"

Nearby in the registry

The prefixes assigned immediately before and after A4:7E:FA:

FAQ

Which company owns MAC address prefix A4:7E:FA?: MAC address prefix A4:7E:FA is registered to Withings in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:7E:FA has a network interface built by Withings.
What is the OUI A4:7E:FA?: A4:7E:FA is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Withings. It covers every address from A4:7E:FA:00:00:00 to A4:7E:FA:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-7E-FA.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A4:7E:FA:00:00:00 that is A4:7E:FA — 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 Withings located?: Withings is listed at 2 rue Maurice Hartmann Issy-les-Moulineaux FR 92130 in the IEEE OUI registry entry for A4:7E:FA. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Withings own?: Withings holds 2 OUI prefixes in the IEEE registry, of which A4:7E:FA is one. A device made by Withings could carry a MAC address from any of them.