Which company owns MAC address prefix C8:75:5B?

MAC address prefix C8:75:5B is registered to Quantify Technology Pty. Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C8:75:5B has a network interface built by Quantify Technology Pty. Ltd..

What is the OUI C8:75:5B?

C8:75:5B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Quantify Technology Pty. Ltd.. It covers every address from C8:75:5B:00:00:00 to C8:75:5B:FF:FF:FF, or 16,777,216 addresses in total. It is also written C8-75-5B.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C8:75:5B:00:00:00 that is C8:75:5B — 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 Quantify Technology Pty. Ltd. located?

Quantify Technology Pty. Ltd. is listed at Suite 1, 4 Sarich Way Bentley Western Australia AU 6102 in the IEEE OUI registry entry for C8:75:5B. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Quantify Technology Pty. Ltd.

MAC address prefix C8:75:5B is registered to Quantify Technology Pty. Ltd. in the IEEE OUI registry. Any device whose MAC address begins with C8:75:5B has a network interface built by Quantify Technology Pty. 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 C8:75:5B:00:00:00 to C8:75:5B:FF:FF:FF.

OUI prefix: C8:75:5B
Hyphen form: C8-75-5B
MAC range: C8:75:5B:00:00:00 – C8:75:5B:FF:FF:FF
Addresses in block: 16,777,216
Organization: Quantify Technology Pty. Ltd.
Address: Suite 1, 4 Sarich Way Bentley Western Australia AU 6102
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 "Quantify Technology Pty. Ltd."
archived source →
2026-07-17Assigned to "Quantify Technology Pty. Ltd."

Nearby in the registry

The prefixes assigned immediately before and after C8:75:5B:

FAQ

Which company owns MAC address prefix C8:75:5B?: MAC address prefix C8:75:5B is registered to Quantify Technology Pty. Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C8:75:5B has a network interface built by Quantify Technology Pty. Ltd..
What is the OUI C8:75:5B?: C8:75:5B is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Quantify Technology Pty. Ltd.. It covers every address from C8:75:5B:00:00:00 to C8:75:5B:FF:FF:FF, or 16,777,216 addresses in total. It is also written C8-75-5B.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C8:75:5B:00:00:00 that is C8:75:5B — 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 Quantify Technology Pty. Ltd. located?: Quantify Technology Pty. Ltd. is listed at Suite 1, 4 Sarich Way Bentley Western Australia AU 6102 in the IEEE OUI registry entry for C8:75:5B. This is the address the organization registered with the IEEE, which may differ from its current operating address.