Which company owns MAC address prefix A4:85:6B?

MAC address prefix A4:85:6B is registered to Q Electronics Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:85:6B has a network interface built by Q Electronics Ltd.

What is the OUI A4:85:6B?

A4:85:6B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Q Electronics Ltd. It covers every address from A4:85:6B:00:00:00 to A4:85:6B:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-85-6B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A4:85:6B:00:00:00 that is A4:85:6B — 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 Q Electronics Ltd located?

Q Electronics Ltd is listed at Beck House, Hawksworth Road Leeds West Yorkshire GB LS18 4JP in the IEEE OUI registry entry for A4:85:6B. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Q Electronics Ltd

MAC address prefix A4:85:6B is registered to Q Electronics Ltd in the IEEE OUI registry. Any device whose MAC address begins with A4:85:6B has a network interface built by Q Electronics Ltd. 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 A4:85:6B:00:00:00 to A4:85:6B:FF:FF:FF.

OUI prefix: A4:85:6B
Hyphen form: A4-85-6B
MAC range: A4:85:6B:00:00:00 – A4:85:6B:FF:FF:FF
Addresses in block: 16,777,216
Organization: Q Electronics Ltd
Address: Beck House, Hawksworth Road Leeds West Yorkshire GB LS18 4JP
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 "Q Electronics Ltd"
archived source →
2026-07-17Assigned to "Q Electronics Ltd"

Nearby in the registry

The prefixes assigned immediately before and after A4:85:6B:

FAQ

Which company owns MAC address prefix A4:85:6B?: MAC address prefix A4:85:6B is registered to Q Electronics Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A4:85:6B has a network interface built by Q Electronics Ltd.
What is the OUI A4:85:6B?: A4:85:6B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Q Electronics Ltd. It covers every address from A4:85:6B:00:00:00 to A4:85:6B:FF:FF:FF, or 16,777,216 addresses in total. It is also written A4-85-6B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A4:85:6B:00:00:00 that is A4:85:6B — 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 Q Electronics Ltd located?: Q Electronics Ltd is listed at Beck House, Hawksworth Road Leeds West Yorkshire GB LS18 4JP in the IEEE OUI registry entry for A4:85:6B. This is the address the organization registered with the IEEE, which may differ from its current operating address.