Which company owns MAC address prefix B4:84:D5?

MAC address prefix B4:84:D5 is registered to GooWi Wireless Technology Co., Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:84:D5 has a network interface built by GooWi Wireless Technology Co., Limited.

What is the OUI B4:84:D5?

B4:84:D5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to GooWi Wireless Technology Co., Limited. It covers every address from B4:84:D5:00:00:00 to B4:84:D5:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-84-D5.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B4:84:D5:00:00:00 that is B4:84:D5 — 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 GooWi Wireless Technology Co., Limited located?

GooWi Wireless Technology Co., Limited is listed at RM1601,Crative BuildingII East Tianan City Futian Shenzhen Guangdong CN 518000 in the IEEE OUI registry entry for B4:84:D5. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does GooWi Wireless Technology Co., Limited own?

GooWi Wireless Technology Co., Limited holds 5 OUI prefixes in the IEEE registry, of which B4:84:D5 is one. A device made by GooWi Wireless Technology Co., Limited could carry a MAC address from any of them.

GooWi Wireless Technology Co., Limited

MAC address prefix B4:84:D5 is registered to GooWi Wireless Technology Co., Limited in the IEEE OUI registry. Any device whose MAC address begins with B4:84:D5 has a network interface built by GooWi Wireless Technology Co., Limited. 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 B4:84:D5:00:00:00 to B4:84:D5:FF:FF:FF.

OUI prefix: B4:84:D5
Hyphen form: B4-84-D5
MAC range: B4:84:D5:00:00:00 – B4:84:D5:FF:FF:FF
Addresses in block: 16,777,216
Organization: GooWi Wireless Technology Co., Limited
Address: RM1601,Crative BuildingII East Tianan City Futian 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.

Other prefixes from GooWi Wireless Technology Co., Limited

GooWi Wireless Technology Co., Limited holds 5 OUI prefixes in total. A device with this exact prefix could just as well carry any of these:

Assignment history (2)

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

2023-07-11Assigned to "GooWi Wireless Technology Co., Limited"
archived source →
2026-07-17Assigned to "GooWi Wireless Technology Co., Limited"

Nearby in the registry

The prefixes assigned immediately before and after B4:84:D5:

FAQ

Which company owns MAC address prefix B4:84:D5?: MAC address prefix B4:84:D5 is registered to GooWi Wireless Technology Co., Limited in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:84:D5 has a network interface built by GooWi Wireless Technology Co., Limited.
What is the OUI B4:84:D5?: B4:84:D5 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to GooWi Wireless Technology Co., Limited. It covers every address from B4:84:D5:00:00:00 to B4:84:D5:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-84-D5.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B4:84:D5:00:00:00 that is B4:84:D5 — 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 GooWi Wireless Technology Co., Limited located?: GooWi Wireless Technology Co., Limited is listed at RM1601,Crative BuildingII East Tianan City Futian Shenzhen Guangdong CN 518000 in the IEEE OUI registry entry for B4:84:D5. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does GooWi Wireless Technology Co., Limited own?: GooWi Wireless Technology Co., Limited holds 5 OUI prefixes in the IEEE registry, of which B4:84:D5 is one. A device made by GooWi Wireless Technology Co., Limited could carry a MAC address from any of them.