Which company owns MAC address prefix B4:7C:29?

MAC address prefix B4:7C:29 is registered to Shenzhen Guzidi Technology Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:7C:29 has a network interface built by Shenzhen Guzidi Technology Co.,Ltd.

What is the OUI B4:7C:29?

B4:7C:29 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Shenzhen Guzidi Technology Co.,Ltd. It covers every address from B4:7C:29:00:00:00 to B4:7C:29:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-7C-29.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B4:7C:29:00:00:00 that is B4:7C:29 — 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 Shenzhen Guzidi Technology Co.,Ltd located?

Shenzhen Guzidi Technology Co.,Ltd is listed at South 6/F,Yingtang Building,No.5 Kejiyuan Road,Nanshan District,Shenzhen City,Guangdong Province,P.R. China Shenzhen Guangdong CN 518000 in the IEEE OUI registry entry for B4:7C:29. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Shenzhen Guzidi Technology Co.,Ltd

MAC address prefix B4:7C:29 is registered to Shenzhen Guzidi Technology Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with B4:7C:29 has a network interface built by Shenzhen Guzidi 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 B4:7C:29:00:00:00 to B4:7C:29:FF:FF:FF.

OUI prefix: B4:7C:29
Hyphen form: B4-7C-29
MAC range: B4:7C:29:00:00:00 – B4:7C:29:FF:FF:FF
Addresses in block: 16,777,216
Organization: Shenzhen Guzidi Technology Co.,Ltd
Address: South 6/F,Yingtang Building,No.5 Kejiyuan Road,Nanshan District,Shenzhen City,Guangdong Province,P.R. China Shenzhen Guangdong CN 518000
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 "Shenzhen Guzidi Technology Co.,Ltd"
archived source →
2026-07-17Assigned to "Shenzhen Guzidi Technology Co.,Ltd"

Nearby in the registry

The prefixes assigned immediately before and after B4:7C:29:

FAQ

Which company owns MAC address prefix B4:7C:29?: MAC address prefix B4:7C:29 is registered to Shenzhen Guzidi Technology Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:7C:29 has a network interface built by Shenzhen Guzidi Technology Co.,Ltd.
What is the OUI B4:7C:29?: B4:7C:29 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Shenzhen Guzidi Technology Co.,Ltd. It covers every address from B4:7C:29:00:00:00 to B4:7C:29:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-7C-29.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B4:7C:29:00:00:00 that is B4:7C:29 — 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 Shenzhen Guzidi Technology Co.,Ltd located?: Shenzhen Guzidi Technology Co.,Ltd is listed at South 6/F,Yingtang Building,No.5 Kejiyuan Road,Nanshan District,Shenzhen City,Guangdong Province,P.R. China Shenzhen Guangdong CN 518000 in the IEEE OUI registry entry for B4:7C:29. This is the address the organization registered with the IEEE, which may differ from its current operating address.