Which company owns MAC address prefix F4:99:AC?

MAC address prefix F4:99:AC is registered to WEBER Schraubautomaten GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F4:99:AC has a network interface built by WEBER Schraubautomaten GmbH.

What is the OUI F4:99:AC?

F4:99:AC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to WEBER Schraubautomaten GmbH. It covers every address from F4:99:AC:00:00:00 to F4:99:AC:FF:FF:FF, or 16,777,216 addresses in total. It is also written F4-99-AC.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in F4:99:AC:00:00:00 that is F4:99:AC — 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 WEBER Schraubautomaten GmbH located?

WEBER Schraubautomaten GmbH is listed at Hans-Urmiller-Ring 56 Wolfratshausen Bayern DE 82515 in the IEEE OUI registry entry for F4:99:AC. This is the address the organization registered with the IEEE, which may differ from its current operating address.

WEBER Schraubautomaten GmbH

MAC address prefix F4:99:AC is registered to WEBER Schraubautomaten GmbH in the IEEE OUI registry. Any device whose MAC address begins with F4:99:AC has a network interface built by WEBER Schraubautomaten 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 F4:99:AC:00:00:00 to F4:99:AC:FF:FF:FF.

OUI prefix: F4:99:AC
Hyphen form: F4-99-AC
MAC range: F4:99:AC:00:00:00 – F4:99:AC:FF:FF:FF
Addresses in block: 16,777,216
Organization: WEBER Schraubautomaten GmbH
Address: Hans-Urmiller-Ring 56 Wolfratshausen Bayern DE 82515
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 "WEBER Schraubautomaten GmbH"
archived source →
2026-07-17Assigned to "WEBER Schraubautomaten GmbH"

Nearby in the registry

The prefixes assigned immediately before and after F4:99:AC:

FAQ

Which company owns MAC address prefix F4:99:AC?: MAC address prefix F4:99:AC is registered to WEBER Schraubautomaten GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with F4:99:AC has a network interface built by WEBER Schraubautomaten GmbH.
What is the OUI F4:99:AC?: F4:99:AC is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to WEBER Schraubautomaten GmbH. It covers every address from F4:99:AC:00:00:00 to F4:99:AC:FF:FF:FF, or 16,777,216 addresses in total. It is also written F4-99-AC.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in F4:99:AC:00:00:00 that is F4:99:AC — 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 WEBER Schraubautomaten GmbH located?: WEBER Schraubautomaten GmbH is listed at Hans-Urmiller-Ring 56 Wolfratshausen Bayern DE 82515 in the IEEE OUI registry entry for F4:99:AC. This is the address the organization registered with the IEEE, which may differ from its current operating address.