Which company owns MAC address prefix D4:55:AD?

MAC address prefix D4:55:AD is registered to go-e GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D4:55:AD has a network interface built by go-e GmbH.

What is the OUI D4:55:AD?

D4:55:AD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to go-e GmbH. It covers every address from D4:55:AD:00:00:00 to D4:55:AD:FF:FF:FF, or 16,777,216 addresses in total. It is also written D4-55-AD.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in D4:55:AD:00:00:00 that is D4:55:AD — 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 go-e GmbH located?

go-e GmbH is listed at Satellitenstrasse 1 Feldkirchen Kaernten AT 9560 in the IEEE OUI registry entry for D4:55:AD. This is the address the organization registered with the IEEE, which may differ from its current operating address.

go-e GmbH

MAC address prefix D4:55:AD is registered to go-e GmbH in the IEEE OUI registry. Any device whose MAC address begins with D4:55:AD has a network interface built by go-e 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 D4:55:AD:00:00:00 to D4:55:AD:FF:FF:FF.

OUI prefix: D4:55:AD
Hyphen form: D4-55-AD
MAC range: D4:55:AD:00:00:00 – D4:55:AD:FF:FF:FF
Addresses in block: 16,777,216
Organization: go-e GmbH
Address: Satellitenstrasse 1 Feldkirchen Kaernten AT 9560
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.

2026-06-20Assigned to "go-e GmbH"
archived source →
2026-07-17Assigned to "go-e GmbH"

Nearby in the registry

The prefixes assigned immediately before and after D4:55:AD:

FAQ

Which company owns MAC address prefix D4:55:AD?: MAC address prefix D4:55:AD is registered to go-e GmbH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with D4:55:AD has a network interface built by go-e GmbH.
What is the OUI D4:55:AD?: D4:55:AD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to go-e GmbH. It covers every address from D4:55:AD:00:00:00 to D4:55:AD:FF:FF:FF, or 16,777,216 addresses in total. It is also written D4-55-AD.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in D4:55:AD:00:00:00 that is D4:55:AD — 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 go-e GmbH located?: go-e GmbH is listed at Satellitenstrasse 1 Feldkirchen Kaernten AT 9560 in the IEEE OUI registry entry for D4:55:AD. This is the address the organization registered with the IEEE, which may differ from its current operating address.