Which company owns MAC address prefix 18:77:58?

MAC address prefix 18:77:58 is registered to Audoo Limited (UK) in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:77:58 has a network interface built by Audoo Limited (UK).

What is the OUI 18:77:58?

18:77:58 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Audoo Limited (UK). It covers every address from 18:77:58:00:00:00 to 18:77:58:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-77-58.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 18:77:58:00:00:00 that is 18:77:58 — 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 Audoo Limited (UK) located?

Audoo Limited (UK) is listed at Unit 23 – Tileyard London, Tileyard Road London UK GB N7 9AH in the IEEE OUI registry entry for 18:77:58. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Audoo Limited (UK)

MAC address prefix 18:77:58 is registered to Audoo Limited (UK) in the IEEE OUI registry. Any device whose MAC address begins with 18:77:58 has a network interface built by Audoo Limited (UK). 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 18:77:58:00:00:00 to 18:77:58:FF:FF:FF.

OUI prefix: 18:77:58
Hyphen form: 18-77-58
MAC range: 18:77:58:00:00:00 – 18:77:58:FF:FF:FF
Addresses in block: 16,777,216
Organization: Audoo Limited (UK)
Address: Unit 23 – Tileyard London, Tileyard Road London UK GB N7 9AH
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 (1)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2026-07-17Assigned to "Audoo Limited (UK)"

Nearby in the registry

The prefixes assigned immediately before and after 18:77:58:

FAQ

Which company owns MAC address prefix 18:77:58?: MAC address prefix 18:77:58 is registered to Audoo Limited (UK) in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:77:58 has a network interface built by Audoo Limited (UK).
What is the OUI 18:77:58?: 18:77:58 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Audoo Limited (UK). It covers every address from 18:77:58:00:00:00 to 18:77:58:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-77-58.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 18:77:58:00:00:00 that is 18:77:58 — 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 Audoo Limited (UK) located?: Audoo Limited (UK) is listed at Unit 23 – Tileyard London, Tileyard Road London UK GB N7 9AH in the IEEE OUI registry entry for 18:77:58. This is the address the organization registered with the IEEE, which may differ from its current operating address.