Which company owns MAC address prefix A0:31:31?

MAC address prefix A0:31:31 is registered to Procenne Digital Security in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:31:31 has a network interface built by Procenne Digital Security.

What is the OUI A0:31:31?

A0:31:31 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Procenne Digital Security. It covers every address from A0:31:31:00:00:00 to A0:31:31:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-31-31.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in A0:31:31:00:00:00 that is A0:31:31 — 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 Procenne Digital Security located?

Procenne Digital Security is listed at Eski Buyukdere Cd. No:7/12 Maslak Istanbul Sariyer TR 34398 in the IEEE OUI registry entry for A0:31:31. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Procenne Digital Security

MAC address prefix A0:31:31 is registered to Procenne Digital Security in the IEEE OUI registry. Any device whose MAC address begins with A0:31:31 has a network interface built by Procenne Digital Security. 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 A0:31:31:00:00:00 to A0:31:31:FF:FF:FF.

OUI prefix: A0:31:31
Hyphen form: A0-31-31
MAC range: A0:31:31:00:00:00 – A0:31:31:FF:FF:FF
Addresses in block: 16,777,216
Organization: Procenne Digital Security
Address: Eski Buyukdere Cd. No:7/12 Maslak Istanbul Sariyer TR 34398
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.

2022-07-11Assigned to "Procenne Digital Security"
archived source →
2026-07-17Assigned to "Procenne Digital Security"

Nearby in the registry

The prefixes assigned immediately before and after A0:31:31:

FAQ

Which company owns MAC address prefix A0:31:31?: MAC address prefix A0:31:31 is registered to Procenne Digital Security in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with A0:31:31 has a network interface built by Procenne Digital Security.
What is the OUI A0:31:31?: A0:31:31 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Procenne Digital Security. It covers every address from A0:31:31:00:00:00 to A0:31:31:FF:FF:FF, or 16,777,216 addresses in total. It is also written A0-31-31.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in A0:31:31:00:00:00 that is A0:31:31 — 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 Procenne Digital Security located?: Procenne Digital Security is listed at Eski Buyukdere Cd. No:7/12 Maslak Istanbul Sariyer TR 34398 in the IEEE OUI registry entry for A0:31:31. This is the address the organization registered with the IEEE, which may differ from its current operating address.