Which company owns MAC address prefix 40:D6:3C?

MAC address prefix 40:D6:3C is registered to Equitech Industrial(DongGuan)Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:D6:3C has a network interface built by Equitech Industrial(DongGuan)Co.,Ltd.

What is the OUI 40:D6:3C?

40:D6:3C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Equitech Industrial(DongGuan)Co.,Ltd. It covers every address from 40:D6:3C:00:00:00 to 40:D6:3C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-D6-3C.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 40:D6:3C:00:00:00 that is 40:D6:3C — 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 Equitech Industrial(DongGuan)Co.,Ltd located?

Equitech Industrial(DongGuan)Co.,Ltd is listed at 4F Building B No.2 ShiChang Road SongYuan Technology Park,DongCheng District DongGuan GuangDong CN 523122 in the IEEE OUI registry entry for 40:D6:3C. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Equitech Industrial(DongGuan)Co.,Ltd

MAC address prefix 40:D6:3C is registered to Equitech Industrial(DongGuan)Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with 40:D6:3C has a network interface built by Equitech Industrial(DongGuan)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 40:D6:3C:00:00:00 to 40:D6:3C:FF:FF:FF.

OUI prefix: 40:D6:3C
Hyphen form: 40-D6-3C
MAC range: 40:D6:3C:00:00:00 – 40:D6:3C:FF:FF:FF
Addresses in block: 16,777,216
Organization: Equitech Industrial(DongGuan)Co.,Ltd
Address: 4F Building B No.2 ShiChang Road SongYuan Technology Park,DongCheng District DongGuan GuangDong CN 523122
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.

2017-09-08Assigned to "Equitech Industrial(DongGuan)Co.,Ltd"
archived source →
2026-07-17Assigned to "Equitech Industrial(DongGuan)Co.,Ltd"

Nearby in the registry

The prefixes assigned immediately before and after 40:D6:3C:

FAQ

Which company owns MAC address prefix 40:D6:3C?: MAC address prefix 40:D6:3C is registered to Equitech Industrial(DongGuan)Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 40:D6:3C has a network interface built by Equitech Industrial(DongGuan)Co.,Ltd.
What is the OUI 40:D6:3C?: 40:D6:3C is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Equitech Industrial(DongGuan)Co.,Ltd. It covers every address from 40:D6:3C:00:00:00 to 40:D6:3C:FF:FF:FF, or 16,777,216 addresses in total. It is also written 40-D6-3C.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 40:D6:3C:00:00:00 that is 40:D6:3C — 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 Equitech Industrial(DongGuan)Co.,Ltd located?: Equitech Industrial(DongGuan)Co.,Ltd is listed at 4F Building B No.2 ShiChang Road SongYuan Technology Park,DongCheng District DongGuan GuangDong CN 523122 in the IEEE OUI registry entry for 40:D6:3C. This is the address the organization registered with the IEEE, which may differ from its current operating address.