Which company owns MAC address prefix 00:12:CA?

MAC address prefix 00:12:CA is registered to Mechatronic Brick Aps in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:12:CA has a network interface built by Mechatronic Brick Aps.

What is the OUI 00:12:CA?

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

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 00:12:CA:00:00:00 that is 00:12:CA — 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 Mechatronic Brick Aps located?

Mechatronic Brick Aps is listed at Alsion 2 6400 Sonderborg DK in the IEEE OUI registry entry for 00:12:CA. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Mechatronic Brick Aps

MAC address prefix 00:12:CA is registered to Mechatronic Brick Aps in the IEEE OUI registry. Any device whose MAC address begins with 00:12:CA has a network interface built by Mechatronic Brick Aps. 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 00:12:CA:00:00:00 to 00:12:CA:FF:FF:FF.

OUI prefix: 00:12:CA
Hyphen form: 00-12-CA
MAC range: 00:12:CA:00:00:00 – 00:12:CA:FF:FF:FF
Addresses in block: 16,777,216
Organization: Mechatronic Brick Aps
Address: Alsion 2 6400 Sonderborg DK
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 "Mechatronic Brick Aps"
archived source →
2026-07-17Assigned to "Mechatronic Brick Aps"

Nearby in the registry

The prefixes assigned immediately before and after 00:12:CA:

FAQ

Which company owns MAC address prefix 00:12:CA?: MAC address prefix 00:12:CA is registered to Mechatronic Brick Aps in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 00:12:CA has a network interface built by Mechatronic Brick Aps.
What is the OUI 00:12:CA?: 00:12:CA is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Mechatronic Brick Aps. It covers every address from 00:12:CA:00:00:00 to 00:12:CA:FF:FF:FF, or 16,777,216 addresses in total. It is also written 00-12-CA.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 00:12:CA:00:00:00 that is 00:12:CA — 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 Mechatronic Brick Aps located?: Mechatronic Brick Aps is listed at Alsion 2 6400 Sonderborg DK in the IEEE OUI registry entry for 00:12:CA. This is the address the organization registered with the IEEE, which may differ from its current operating address.