Which company owns MAC address prefix A8:D4:98?

MAC address prefix A8:D4:98 is registered to Avira Operations GmbH & Co. KG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A8:D4:98 has a network interface built by Avira Operations GmbH & Co. KG.

What is the OUI A8:D4:98?

A8:D4:98 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Avira Operations GmbH & Co. KG. It covers every address from A8:D4:98:00:00:00 to A8:D4:98:FF:FF:FF, or 16,777,216 addresses in total. It is also written A8-D4-98.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A8:D4:98:00:00:00 that is A8:D4:98 — 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 Avira Operations GmbH & Co. KG located?

Avira Operations GmbH & Co. KG is listed at Kaplaneiweg 1 Tettnang Baden-Wuerttermberg DE 88069 in the IEEE OUI registry entry for A8:D4:98. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Avira Operations GmbH & Co. KG

MAC address prefix A8:D4:98 is registered to Avira Operations GmbH & Co. KG in the IEEE OUI registry. Any device whose MAC address begins with A8:D4:98 has a network interface built by Avira Operations GmbH & Co. KG. 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 A8:D4:98:00:00:00 to A8:D4:98:FF:FF:FF.

OUI prefix: A8:D4:98
Hyphen form: A8-D4-98
MAC range: A8:D4:98:00:00:00 – A8:D4:98:FF:FF:FF
Addresses in block: 16,777,216
Organization: Avira Operations GmbH & Co. KG
Address: Kaplaneiweg 1 Tettnang Baden-Wuerttermberg DE 88069
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.

2018-12-21Assigned to "Avira Operations GmbH & Co. KG"
archived source →
2026-07-17Assigned to "Avira Operations GmbH & Co. KG"

Nearby in the registry

The prefixes assigned immediately before and after A8:D4:98:

FAQ

Which company owns MAC address prefix A8:D4:98?: MAC address prefix A8:D4:98 is registered to Avira Operations GmbH & Co. KG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A8:D4:98 has a network interface built by Avira Operations GmbH & Co. KG.
What is the OUI A8:D4:98?: A8:D4:98 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Avira Operations GmbH & Co. KG. It covers every address from A8:D4:98:00:00:00 to A8:D4:98:FF:FF:FF, or 16,777,216 addresses in total. It is also written A8-D4-98.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A8:D4:98:00:00:00 that is A8:D4:98 — 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 Avira Operations GmbH & Co. KG located?: Avira Operations GmbH & Co. KG is listed at Kaplaneiweg 1 Tettnang Baden-Wuerttermberg DE 88069 in the IEEE OUI registry entry for A8:D4:98. This is the address the organization registered with the IEEE, which may differ from its current operating address.