Which company owns MAC address prefix C0:71:AA?

MAC address prefix C0:71:AA is registered to ShenZhen OnMicro Electronics Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C0:71:AA has a network interface built by ShenZhen OnMicro Electronics Co.,Ltd..

What is the OUI C0:71:AA?

C0:71:AA is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ShenZhen OnMicro Electronics Co.,Ltd.. It covers every address from C0:71:AA:00:00:00 to C0:71:AA:FF:FF:FF, or 16,777,216 addresses in total. It is also written C0-71-AA.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in C0:71:AA:00:00:00 that is C0:71:AA — 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 OnMicro Electronics Co.,Ltd. located?

ShenZhen OnMicro Electronics Co.,Ltd. is listed at Room 407-408, West Building, Skyworth Semiconductor Building, GaoXin South 4th Road, Yuehai Street, Nanshan District Shenzhen GuangDong CN 518057 in the IEEE OUI registry entry for C0:71:AA. This is the address the organization registered with the IEEE, which may differ from its current operating address.

ShenZhen OnMicro Electronics Co.,Ltd.

MAC address prefix C0:71:AA is registered to ShenZhen OnMicro Electronics Co.,Ltd. in the IEEE OUI registry. Any device whose MAC address begins with C0:71:AA has a network interface built by ShenZhen OnMicro 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 C0:71:AA:00:00:00 to C0:71:AA:FF:FF:FF.

OUI prefix: C0:71:AA
Hyphen form: C0-71-AA
MAC range: C0:71:AA:00:00:00 – C0:71:AA:FF:FF:FF
Addresses in block: 16,777,216
Organization: ShenZhen OnMicro Electronics Co.,Ltd.
Address: Room 407-408, West Building, Skyworth Semiconductor Building, GaoXin South 4th Road, Yuehai Street, Nanshan District 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.

Assignment history (2)

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

2022-07-11Assigned to "ShenZhen OnMicro Electronics Co.,Ltd."
archived source →
2026-07-17Assigned to "ShenZhen OnMicro Electronics Co.,Ltd."

Nearby in the registry

The prefixes assigned immediately before and after C0:71:AA:

FAQ

Which company owns MAC address prefix C0:71:AA?: MAC address prefix C0:71:AA is registered to ShenZhen OnMicro Electronics Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with C0:71:AA has a network interface built by ShenZhen OnMicro Electronics Co.,Ltd..
What is the OUI C0:71:AA?: C0:71:AA is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to ShenZhen OnMicro Electronics Co.,Ltd.. It covers every address from C0:71:AA:00:00:00 to C0:71:AA:FF:FF:FF, or 16,777,216 addresses in total. It is also written C0-71-AA.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in C0:71:AA:00:00:00 that is C0:71:AA — 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 OnMicro Electronics Co.,Ltd. located?: ShenZhen OnMicro Electronics Co.,Ltd. is listed at Room 407-408, West Building, Skyworth Semiconductor Building, GaoXin South 4th Road, Yuehai Street, Nanshan District Shenzhen GuangDong CN 518057 in the IEEE OUI registry entry for C0:71:AA. This is the address the organization registered with the IEEE, which may differ from its current operating address.