Which company owns MAC address prefix D0:A3:11?

MAC address prefix D0:A3:11 is registered to Neuberger Gebäudeautomation GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D0:A3:11 has a network interface built by Neuberger Gebäudeautomation GmbH.

What is the OUI D0:A3:11?

D0:A3:11 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Neuberger Gebäudeautomation GmbH. It covers every address from D0:A3:11:00:00:00 to D0:A3:11:FF:FF:FF, or 16,777,216 addresses in total. It is also written D0-A3-11.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D0:A3:11:00:00:00 that is D0:A3:11 — 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 Neuberger Gebäudeautomation GmbH located?

Neuberger Gebäudeautomation GmbH is listed at Oberer Kaiserweg 6 Rothenburg o.d.T. Bayern DE 91541 in the IEEE OUI registry entry for D0:A3:11. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Neuberger Gebäudeautomation GmbH

MAC address prefix D0:A3:11 is registered to Neuberger Gebäudeautomation GmbH in the IEEE OUI registry. Any device whose MAC address begins with D0:A3:11 has a network interface built by Neuberger Gebäudeautomation 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 D0:A3:11:00:00:00 to D0:A3:11:FF:FF:FF.

OUI prefix: D0:A3:11
Hyphen form: D0-A3-11
MAC range: D0:A3:11:00:00:00 – D0:A3:11:FF:FF:FF
Addresses in block: 16,777,216
Organization: Neuberger Gebäudeautomation GmbH
Address: Oberer Kaiserweg 6 Rothenburg o.d.T. Bayern DE 91541
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 "Neuberger Gebäudeautomation GmbH"
archived source →
2026-07-17Assigned to "Neuberger Gebäudeautomation GmbH"

Nearby in the registry

The prefixes assigned immediately before and after D0:A3:11:

FAQ

Which company owns MAC address prefix D0:A3:11?: MAC address prefix D0:A3:11 is registered to Neuberger Gebäudeautomation GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D0:A3:11 has a network interface built by Neuberger Gebäudeautomation GmbH.
What is the OUI D0:A3:11?: D0:A3:11 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Neuberger Gebäudeautomation GmbH. It covers every address from D0:A3:11:00:00:00 to D0:A3:11:FF:FF:FF, or 16,777,216 addresses in total. It is also written D0-A3-11.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D0:A3:11:00:00:00 that is D0:A3:11 — 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 Neuberger Gebäudeautomation GmbH located?: Neuberger Gebäudeautomation GmbH is listed at Oberer Kaiserweg 6 Rothenburg o.d.T. Bayern DE 91541 in the IEEE OUI registry entry for D0:A3:11. This is the address the organization registered with the IEEE, which may differ from its current operating address.