Which company owns MAC address prefix F4:3E:46?

MAC address prefix F4:3E:46 is registered to Xenox IT & Kommunikations GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F4:3E:46 has a network interface built by Xenox IT & Kommunikations GmbH.

What is the OUI F4:3E:46?

F4:3E:46 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Xenox IT & Kommunikations GmbH. It covers every address from F4:3E:46:00:00:00 to F4:3E:46:FF:FF:FF, or 16,777,216 addresses in total. It is also written F4-3E-46.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F4:3E:46:00:00:00 that is F4:3E:46 — 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 Xenox IT & Kommunikations GmbH located?

Xenox IT & Kommunikations GmbH is listed at Blumengasse 9 Lanzenkirchen AT 2821 in the IEEE OUI registry entry for F4:3E:46. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Xenox IT & Kommunikations GmbH

MAC address prefix F4:3E:46 is registered to Xenox IT & Kommunikations GmbH in the IEEE OUI registry. Any device whose MAC address begins with F4:3E:46 has a network interface built by Xenox IT & Kommunikations GmbH. 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 F4:3E:46:00:00:00 to F4:3E:46:FF:FF:FF.

OUI prefix: F4:3E:46
Hyphen form: F4-3E-46
MAC range: F4:3E:46:00:00:00 – F4:3E:46:FF:FF:FF
Addresses in block: 16,777,216
Organization: Xenox IT & Kommunikations GmbH
Address: Blumengasse 9 Lanzenkirchen AT 2821
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 (1)

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

2026-10-14Assigned to "Xenox IT & Kommunikations GmbH"

Nearby in the registry

The prefixes assigned immediately before and after F4:3E:46:

FAQ

Which company owns MAC address prefix F4:3E:46?: MAC address prefix F4:3E:46 is registered to Xenox IT & Kommunikations GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F4:3E:46 has a network interface built by Xenox IT & Kommunikations GmbH.
What is the OUI F4:3E:46?: F4:3E:46 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Xenox IT & Kommunikations GmbH. It covers every address from F4:3E:46:00:00:00 to F4:3E:46:FF:FF:FF, or 16,777,216 addresses in total. It is also written F4-3E-46.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F4:3E:46:00:00:00 that is F4:3E:46 — 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 Xenox IT & Kommunikations GmbH located?: Xenox IT & Kommunikations GmbH is listed at Blumengasse 9 Lanzenkirchen AT 2821 in the IEEE OUI registry entry for F4:3E:46. This is the address the organization registered with the IEEE, which may differ from its current operating address.