Which company owns MAC address prefix B4:81:07?

MAC address prefix B4:81:07 is registered to SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:81:07 has a network interface built by SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD.

What is the OUI B4:81:07?

B4:81:07 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD. It covers every address from B4:81:07:00:00:00 to B4:81:07:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-81-07.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in B4:81:07:00:00:00 that is B4:81:07 — 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 CHUANGWEI-RGB ELECTRONICS CO.,LTD located?

SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD is listed at Unit East Block22-24/F,Skyworth semiconductor design Bldg., Gaoxin Ave.4.S.,Nanshan District,Shenzhen,China SHENZHEN GUANGDONG CN 518057 in the IEEE OUI registry entry for B4:81:07. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD own?

SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD holds 21 OUI prefixes in the IEEE registry, of which B4:81:07 is one. A device made by SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD could carry a MAC address from any of them.

SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD

MAC address prefix B4:81:07 is registered to SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD in the IEEE OUI registry. Any device whose MAC address begins with B4:81:07 has a network interface built by SHENZHEN CHUANGWEI-RGB ELECTRONICS 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 B4:81:07:00:00:00 to B4:81:07:FF:FF:FF.

OUI prefix: B4:81:07
Hyphen form: B4-81-07
MAC range: B4:81:07:00:00:00 – B4:81:07:FF:FF:FF
Addresses in block: 16,777,216
Organization: SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD
Address: Unit East Block22-24/F,Skyworth semiconductor design Bldg., Gaoxin Ave.4.S.,Nanshan District,Shenzhen,China SHENZHEN GUANGDONG CN 518057
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 SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD

SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD holds 21 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.

2020-03-21Assigned to "SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD"
archived source →
2026-07-17Assigned to "SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD"

Nearby in the registry

The prefixes assigned immediately before and after B4:81:07:

FAQ

Which company owns MAC address prefix B4:81:07?: MAC address prefix B4:81:07 is registered to SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with B4:81:07 has a network interface built by SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD.
What is the OUI B4:81:07?: B4:81:07 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD. It covers every address from B4:81:07:00:00:00 to B4:81:07:FF:FF:FF, or 16,777,216 addresses in total. It is also written B4-81-07.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in B4:81:07:00:00:00 that is B4:81:07 — 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 CHUANGWEI-RGB ELECTRONICS CO.,LTD located?: SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD is listed at Unit East Block22-24/F,Skyworth semiconductor design Bldg., Gaoxin Ave.4.S.,Nanshan District,Shenzhen,China SHENZHEN GUANGDONG CN 518057 in the IEEE OUI registry entry for B4:81:07. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD own?: SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD holds 21 OUI prefixes in the IEEE registry, of which B4:81:07 is one. A device made by SHENZHEN CHUANGWEI-RGB ELECTRONICS CO.,LTD could carry a MAC address from any of them.