Which company owns MAC address prefix 18:20:12?

MAC address prefix 18:20:12 is registered to Aztech Associates Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:20:12 has a network interface built by Aztech Associates Inc..

What is the OUI 18:20:12?

18:20:12 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Aztech Associates Inc.. It covers every address from 18:20:12:00:00:00 to 18:20:12:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-20-12.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 18:20:12:00:00:00 that is 18:20:12 — 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 Aztech Associates Inc. located?

Aztech Associates Inc. is listed at 805 Bayridge Dr. Kingston Ontario CA K7P1T5 in the IEEE OUI registry entry for 18:20:12. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Aztech Associates Inc.

MAC address prefix 18:20:12 is registered to Aztech Associates Inc. in the IEEE OUI registry. Any device whose MAC address begins with 18:20:12 has a network interface built by Aztech Associates Inc.. 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 18:20:12:00:00:00 to 18:20:12:FF:FF:FF.

OUI prefix: 18:20:12
Hyphen form: 18-20-12
MAC range: 18:20:12:00:00:00 – 18:20:12:FF:FF:FF
Addresses in block: 16,777,216
Organization: Aztech Associates Inc.
Address: 805 Bayridge Dr. Kingston Ontario CA K7P1T5
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 "Aztech Associates Inc."
archived source →
2026-07-17Assigned to "Aztech Associates Inc."

Nearby in the registry

The prefixes assigned immediately before and after 18:20:12:

FAQ

Which company owns MAC address prefix 18:20:12?: MAC address prefix 18:20:12 is registered to Aztech Associates Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:20:12 has a network interface built by Aztech Associates Inc..
What is the OUI 18:20:12?: 18:20:12 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Aztech Associates Inc.. It covers every address from 18:20:12:00:00:00 to 18:20:12:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-20-12.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 18:20:12:00:00:00 that is 18:20:12 — 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 Aztech Associates Inc. located?: Aztech Associates Inc. is listed at 805 Bayridge Dr. Kingston Ontario CA K7P1T5 in the IEEE OUI registry entry for 18:20:12. This is the address the organization registered with the IEEE, which may differ from its current operating address.