Which company owns MAC address prefix 6C:65:67?

MAC address prefix 6C:65:67 is registered to BELIMO Automation AG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 6C:65:67 has a network interface built by BELIMO Automation AG.

What is the OUI 6C:65:67?

6C:65:67 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to BELIMO Automation AG. It covers every address from 6C:65:67:00:00:00 to 6C:65:67:FF:FF:FF, or 16,777,216 addresses in total. It is also written 6C-65-67.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 6C:65:67:00:00:00 that is 6C:65:67 — 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 BELIMO Automation AG located?

BELIMO Automation AG is listed at brunnenbachstrasse 1 Hinwil Zurich CH 8340 in the IEEE OUI registry entry for 6C:65:67. This is the address the organization registered with the IEEE, which may differ from its current operating address.

BELIMO Automation AG

MAC address prefix 6C:65:67 is registered to BELIMO Automation AG in the IEEE OUI registry. Any device whose MAC address begins with 6C:65:67 has a network interface built by BELIMO Automation AG. 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 6C:65:67:00:00:00 to 6C:65:67:FF:FF:FF.

OUI prefix: 6C:65:67
Hyphen form: 6C-65-67
MAC range: 6C:65:67:00:00:00 – 6C:65:67:FF:FF:FF
Addresses in block: 16,777,216
Organization: BELIMO Automation AG
Address: brunnenbachstrasse 1 Hinwil Zurich CH 8340
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.

2022-07-11Assigned to "BELIMO Automation AG"
archived source →
2026-07-17Assigned to "BELIMO Automation AG"

Nearby in the registry

The prefixes assigned immediately before and after 6C:65:67:

FAQ

Which company owns MAC address prefix 6C:65:67?: MAC address prefix 6C:65:67 is registered to BELIMO Automation AG in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 6C:65:67 has a network interface built by BELIMO Automation AG.
What is the OUI 6C:65:67?: 6C:65:67 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to BELIMO Automation AG. It covers every address from 6C:65:67:00:00:00 to 6C:65:67:FF:FF:FF, or 16,777,216 addresses in total. It is also written 6C-65-67.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 6C:65:67:00:00:00 that is 6C:65:67 — 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 BELIMO Automation AG located?: BELIMO Automation AG is listed at brunnenbachstrasse 1 Hinwil Zurich CH 8340 in the IEEE OUI registry entry for 6C:65:67. This is the address the organization registered with the IEEE, which may differ from its current operating address.