Which company owns MAC address prefix DC:6B:12?

MAC address prefix DC:6B:12 is registered to worldcns inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:6B:12 has a network interface built by worldcns inc..

What is the OUI DC:6B:12?

DC:6B:12 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to worldcns inc.. It covers every address from DC:6B:12:00:00:00 to DC:6B:12:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-6B-12.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in DC:6B:12:00:00:00 that is DC:6B: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 worldcns inc. located?

worldcns inc. is listed at 174, Namjo-ro 1-gil, Jocheon-eup Jeju-si Jeju-do KR 63335 in the IEEE OUI registry entry for DC:6B:12. This is the address the organization registered with the IEEE, which may differ from its current operating address.

worldcns inc.

MAC address prefix DC:6B:12 is registered to worldcns inc. in the IEEE OUI registry. Any device whose MAC address begins with DC:6B:12 has a network interface built by worldcns 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 DC:6B:12:00:00:00 to DC:6B:12:FF:FF:FF.

OUI prefix: DC:6B:12
Hyphen form: DC-6B-12
MAC range: DC:6B:12:00:00:00 – DC:6B:12:FF:FF:FF
Addresses in block: 16,777,216
Organization: worldcns inc.
Address: 174, Namjo-ro 1-gil, Jocheon-eup Jeju-si Jeju-do KR 63335
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.

2020-03-21Assigned to "worldcns inc."
archived source →
2026-07-17Assigned to "worldcns inc."

Nearby in the registry

The prefixes assigned immediately before and after DC:6B:12:

FAQ

Which company owns MAC address prefix DC:6B:12?: MAC address prefix DC:6B:12 is registered to worldcns inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with DC:6B:12 has a network interface built by worldcns inc..
What is the OUI DC:6B:12?: DC:6B:12 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to worldcns inc.. It covers every address from DC:6B:12:00:00:00 to DC:6B:12:FF:FF:FF, or 16,777,216 addresses in total. It is also written DC-6B-12.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in DC:6B:12:00:00:00 that is DC:6B: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 worldcns inc. located?: worldcns inc. is listed at 174, Namjo-ro 1-gil, Jocheon-eup Jeju-si Jeju-do KR 63335 in the IEEE OUI registry entry for DC:6B:12. This is the address the organization registered with the IEEE, which may differ from its current operating address.