Which company owns MAC address prefix 6C:AD:EF?

MAC address prefix 6C:AD:EF is registered to KZ Broadband Technologies, Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 6C:AD:EF has a network interface built by KZ Broadband Technologies, Ltd..

What is the OUI 6C:AD:EF?

6C:AD:EF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to KZ Broadband Technologies, Ltd.. It covers every address from 6C:AD:EF:00:00:00 to 6C:AD:EF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 6C-AD-EF.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 6C:AD:EF:00:00:00 that is 6C:AD:EF — 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 KZ Broadband Technologies, Ltd. located?

KZ Broadband Technologies, Ltd. is listed at 1601 Tower C Shenzhen Guangdong CN 518057 in the IEEE OUI registry entry for 6C:AD:EF. This is the address the organization registered with the IEEE, which may differ from its current operating address.

KZ Broadband Technologies, Ltd.

MAC address prefix 6C:AD:EF is registered to KZ Broadband Technologies, Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 6C:AD:EF has a network interface built by KZ Broadband Technologies, 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 6C:AD:EF:00:00:00 to 6C:AD:EF:FF:FF:FF.

OUI prefix: 6C:AD:EF
Hyphen form: 6C-AD-EF
MAC range: 6C:AD:EF:00:00:00 – 6C:AD:EF:FF:FF:FF
Addresses in block: 16,777,216
Organization: KZ Broadband Technologies, Ltd.
Address: 1601 Tower C Shenzhen Guangdong CN 518057
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 "KZ Broadband Technologies, Ltd."
archived source →
2026-07-17Assigned to "KZ Broadband Technologies, Ltd."

Nearby in the registry

The prefixes assigned immediately before and after 6C:AD:EF:

FAQ

Which company owns MAC address prefix 6C:AD:EF?: MAC address prefix 6C:AD:EF is registered to KZ Broadband Technologies, Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 6C:AD:EF has a network interface built by KZ Broadband Technologies, Ltd..
What is the OUI 6C:AD:EF?: 6C:AD:EF is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to KZ Broadband Technologies, Ltd.. It covers every address from 6C:AD:EF:00:00:00 to 6C:AD:EF:FF:FF:FF, or 16,777,216 addresses in total. It is also written 6C-AD-EF.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 6C:AD:EF:00:00:00 that is 6C:AD:EF — 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 KZ Broadband Technologies, Ltd. located?: KZ Broadband Technologies, Ltd. is listed at 1601 Tower C Shenzhen Guangdong CN 518057 in the IEEE OUI registry entry for 6C:AD:EF. This is the address the organization registered with the IEEE, which may differ from its current operating address.