Which company owns MAC address prefix B4:DC:09?

MAC address prefix B4:DC:09 is registered to Guangzhou Dawei Communication Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:DC:09 has a network interface built by Guangzhou Dawei Communication Co.,Ltd.

What is the OUI B4:DC:09?

B4:DC:09 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Guangzhou Dawei Communication Co.,Ltd. It covers every address from B4:DC:09:00:00:00 to B4:DC:09:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-DC-09.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B4:DC:09:00:00:00 that is B4:DC:09 — 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 Guangzhou Dawei Communication Co.,Ltd located?

Guangzhou Dawei Communication Co.,Ltd is listed at Zone A 906#, International Business Incubator, No.3 Juquan Road, Huangpu District Guangzhou Guangdong CN 510660 in the IEEE OUI registry entry for B4:DC:09. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Guangzhou Dawei Communication Co.,Ltd

MAC address prefix B4:DC:09 is registered to Guangzhou Dawei Communication Co.,Ltd in the IEEE OUI registry. Any device whose MAC address begins with B4:DC:09 has a network interface built by Guangzhou Dawei Communication 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:DC:09:00:00:00 to B4:DC:09:FF:FF:FF.

OUI prefix: B4:DC:09
Hyphen form: B4-DC-09
MAC range: B4:DC:09:00:00:00 – B4:DC:09:FF:FF:FF
Addresses in block: 16,777,216
Organization: Guangzhou Dawei Communication Co.,Ltd
Address: Zone A 906#, International Business Incubator, No.3 Juquan Road, Huangpu District Guangzhou Guangdong CN 510660
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.

2019-07-04Assigned to "Guangzhou Dawei Communication Co.,Ltd"
archived source →
2026-07-17Assigned to "Guangzhou Dawei Communication Co.,Ltd"

Nearby in the registry

The prefixes assigned immediately before and after B4:DC:09:

FAQ

Which company owns MAC address prefix B4:DC:09?: MAC address prefix B4:DC:09 is registered to Guangzhou Dawei Communication Co.,Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:DC:09 has a network interface built by Guangzhou Dawei Communication Co.,Ltd.
What is the OUI B4:DC:09?: B4:DC:09 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Guangzhou Dawei Communication Co.,Ltd. It covers every address from B4:DC:09:00:00:00 to B4:DC:09:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-DC-09.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B4:DC:09:00:00:00 that is B4:DC:09 — 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 Guangzhou Dawei Communication Co.,Ltd located?: Guangzhou Dawei Communication Co.,Ltd is listed at Zone A 906#, International Business Incubator, No.3 Juquan Road, Huangpu District Guangzhou Guangdong CN 510660 in the IEEE OUI registry entry for B4:DC:09. This is the address the organization registered with the IEEE, which may differ from its current operating address.