Which company owns MAC address prefix C0:35:80?

MAC address prefix C0:35:80 is registered to A&R TECH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C0:35:80 has a network interface built by A&R TECH.

What is the OUI C0:35:80?

C0:35:80 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to A&R TECH. It covers every address from C0:35:80:00:00:00 to C0:35:80:FF:FF:FF, or 16,777,216 addresses in total. It is also written C0-35-80.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C0:35:80:00:00:00 that is C0:35:80 — 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 A&R TECH located?

A&R TECH is listed at Marksteinergasse 13 Vienna AT 1210 in the IEEE OUI registry entry for C0:35:80. This is the address the organization registered with the IEEE, which may differ from its current operating address.

A&R TECH

MAC address prefix C0:35:80 is registered to A&R TECH in the IEEE OUI registry. Any device whose MAC address begins with C0:35:80 has a network interface built by A&R TECH. 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 C0:35:80:00:00:00 to C0:35:80:FF:FF:FF.

OUI prefix: C0:35:80
Hyphen form: C0-35-80
MAC range: C0:35:80:00:00:00 – C0:35:80:FF:FF:FF
Addresses in block: 16,777,216
Organization: A&R TECH
Address: Marksteinergasse 13 Vienna AT 1210
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 "A&R TECH"
archived source →
2026-07-17Assigned to "A&R TECH"

Nearby in the registry

The prefixes assigned immediately before and after C0:35:80:

FAQ

Which company owns MAC address prefix C0:35:80?: MAC address prefix C0:35:80 is registered to A&R TECH in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C0:35:80 has a network interface built by A&R TECH.
What is the OUI C0:35:80?: C0:35:80 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to A&R TECH. It covers every address from C0:35:80:00:00:00 to C0:35:80:FF:FF:FF, or 16,777,216 addresses in total. It is also written C0-35-80.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C0:35:80:00:00:00 that is C0:35:80 — 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 A&R TECH located?: A&R TECH is listed at Marksteinergasse 13 Vienna AT 1210 in the IEEE OUI registry entry for C0:35:80. This is the address the organization registered with the IEEE, which may differ from its current operating address.