Which company owns MAC address prefix A0:DC:04?

MAC address prefix A0:DC:04 is registered to Becker-Antriebe GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:DC:04 has a network interface built by Becker-Antriebe GmbH.

What is the OUI A0:DC:04?

A0:DC:04 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Becker-Antriebe GmbH. It covers every address from A0:DC:04:00:00:00 to A0:DC:04:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-DC-04.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A0:DC:04:00:00:00 that is A0:DC:04 — 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 Becker-Antriebe GmbH located?

Becker-Antriebe GmbH is listed at Friedrich-Ebert-Straße 2 - 4 35764 Sinn Hessen DE DE811177977 in the IEEE OUI registry entry for A0:DC:04. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Becker-Antriebe GmbH

MAC address prefix A0:DC:04 is registered to Becker-Antriebe GmbH in the IEEE OUI registry. Any device whose MAC address begins with A0:DC:04 has a network interface built by Becker-Antriebe 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 A0:DC:04:00:00:00 to A0:DC:04:FF:FF:FF.

OUI prefix: A0:DC:04
Hyphen form: A0-DC-04
MAC range: A0:DC:04:00:00:00 – A0:DC:04:FF:FF:FF
Addresses in block: 16,777,216
Organization: Becker-Antriebe GmbH
Address: Friedrich-Ebert-Straße 2 - 4 35764 Sinn Hessen DE DE811177977
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 "Becker-Antriebe GmbH"
archived source →
2026-07-17Assigned to "Becker-Antriebe GmbH"

Nearby in the registry

The prefixes assigned immediately before and after A0:DC:04:

FAQ

Which company owns MAC address prefix A0:DC:04?: MAC address prefix A0:DC:04 is registered to Becker-Antriebe GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:DC:04 has a network interface built by Becker-Antriebe GmbH.
What is the OUI A0:DC:04?: A0:DC:04 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Becker-Antriebe GmbH. It covers every address from A0:DC:04:00:00:00 to A0:DC:04:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-DC-04.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A0:DC:04:00:00:00 that is A0:DC:04 — 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 Becker-Antriebe GmbH located?: Becker-Antriebe GmbH is listed at Friedrich-Ebert-Straße 2 - 4 35764 Sinn Hessen DE DE811177977 in the IEEE OUI registry entry for A0:DC:04. This is the address the organization registered with the IEEE, which may differ from its current operating address.