Which company owns MAC address prefix 18:C2:3C?

MAC address prefix 18:C2:3C is registered to Lumi United Technology Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:C2:3C has a network interface built by Lumi United Technology Co., Ltd.

What is the OUI 18:C2:3C?

18:C2:3C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Lumi United Technology Co., Ltd. It covers every address from 18:C2:3C:00:00:00 to 18:C2:3C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-C2-3C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 18:C2:3C:00:00:00 that is 18:C2:3C — 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 Lumi United Technology Co., Ltd located?

Lumi United Technology Co., Ltd is listed at 8th Floor, JinQi Wisdom Valley, No.1 TangLing Road, LinXian Ave, Taoyuan Residential District,Nanshan District ShenZhen GuangDong CN 518055 in the IEEE OUI registry entry for 18:C2:3C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Lumi United Technology Co., Ltd own?

Lumi United Technology Co., Ltd holds 2 OUI prefixes in the IEEE registry, of which 18:C2:3C is one. A device made by Lumi United Technology Co., Ltd could carry a MAC address from any of them.

Lumi United Technology Co., Ltd

MAC address prefix 18:C2:3C is registered to Lumi United Technology Co., Ltd in the IEEE OUI registry. Any device whose MAC address begins with 18:C2:3C has a network interface built by Lumi United Technology Co., 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 18:C2:3C:00:00:00 to 18:C2:3C:FF:FF:FF.

OUI prefix: 18:C2:3C
Hyphen form: 18-C2-3C
MAC range: 18:C2:3C:00:00:00 – 18:C2:3C:FF:FF:FF
Addresses in block: 16,777,216
Organization: Lumi United Technology Co., Ltd
Address: 8th Floor, JinQi Wisdom Valley, No.1 TangLing Road, LinXian Ave, Taoyuan Residential District,Nanshan District ShenZhen GuangDong CN 518055
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.

Other prefixes from Lumi United Technology Co., Ltd

Lumi United Technology Co., Ltd holds 2 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

54:EF:44

Assignment history (1)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2026-07-17Assigned to "Lumi United Technology Co., Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 18:C2:3C:

FAQ

Which company owns MAC address prefix 18:C2:3C?: MAC address prefix 18:C2:3C is registered to Lumi United Technology Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 18:C2:3C has a network interface built by Lumi United Technology Co., Ltd.
What is the OUI 18:C2:3C?: 18:C2:3C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Lumi United Technology Co., Ltd. It covers every address from 18:C2:3C:00:00:00 to 18:C2:3C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 18-C2-3C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 18:C2:3C:00:00:00 that is 18:C2:3C — 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 Lumi United Technology Co., Ltd located?: Lumi United Technology Co., Ltd is listed at 8th Floor, JinQi Wisdom Valley, No.1 TangLing Road, LinXian Ave, Taoyuan Residential District,Nanshan District ShenZhen GuangDong CN 518055 in the IEEE OUI registry entry for 18:C2:3C. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Lumi United Technology Co., Ltd own?: Lumi United Technology Co., Ltd holds 2 OUI prefixes in the IEEE registry, of which 18:C2:3C is one. A device made by Lumi United Technology Co., Ltd could carry a MAC address from any of them.