Which company owns MAC address prefix A4:D0:94?

MAC address prefix A4:D0:94 is registered to VIVAVIS AG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:D0:94 has a network interface built by VIVAVIS AG.

What is the OUI A4:D0:94?

A4:D0:94 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to VIVAVIS AG. It covers every address from A4:D0:94:00:00:00 to A4:D0:94:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-D0-94.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A4:D0:94:00:00:00 that is A4:D0:94 — 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 VIVAVIS AG located?

VIVAVIS AG is listed at Nobelstr. 18 Ettlingen DE D-76375 in the IEEE OUI registry entry for A4:D0:94. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does VIVAVIS AG own?

VIVAVIS AG holds 2 OUI prefixes in the IEEE registry, of which A4:D0:94 is one. A device made by VIVAVIS AG could carry a MAC address from any of them.

VIVAVIS AG

MAC address prefix A4:D0:94 is registered to VIVAVIS AG in the IEEE OUI registry. Any device whose MAC address begins with A4:D0:94 has a network interface built by VIVAVIS AG. 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:D0:94:00:00:00 to A4:D0:94:FF:FF:FF.

OUI prefix: A4:D0:94
Hyphen form: A4-D0-94
MAC range: A4:D0:94:00:00:00 – A4:D0:94:FF:FF:FF
Addresses in block: 16,777,216
Organization: VIVAVIS AG
Address: Nobelstr. 18 Ettlingen DE D-76375
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 VIVAVIS AG

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

00:12:AD

Assignment history (3)

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 "Erwin Peters Systemtechnik GmbH"
archived source →
2021-06-10Renamed from "Erwin Peters Systemtechnik GmbH" to "VIVAVIS AG"
archived source →
2026-07-17Assigned to "VIVAVIS AG"

Nearby in the registry

The prefixes assigned immediately before and after A4:D0:94:

FAQ

Which company owns MAC address prefix A4:D0:94?: MAC address prefix A4:D0:94 is registered to VIVAVIS AG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:D0:94 has a network interface built by VIVAVIS AG.
What is the OUI A4:D0:94?: A4:D0:94 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to VIVAVIS AG. It covers every address from A4:D0:94:00:00:00 to A4:D0:94:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-D0-94.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A4:D0:94:00:00:00 that is A4:D0:94 — 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 VIVAVIS AG located?: VIVAVIS AG is listed at Nobelstr. 18 Ettlingen DE D-76375 in the IEEE OUI registry entry for A4:D0:94. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does VIVAVIS AG own?: VIVAVIS AG holds 2 OUI prefixes in the IEEE registry, of which A4:D0:94 is one. A device made by VIVAVIS AG could carry a MAC address from any of them.