Which company owns MAC address prefix E0:4E:7A?

MAC address prefix E0:4E:7A is registered to Nanjing Qinheng Microelectronics Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E0:4E:7A has a network interface built by Nanjing Qinheng Microelectronics Co., Ltd..

What is the OUI E0:4E:7A?

E0:4E:7A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Nanjing Qinheng Microelectronics Co., Ltd.. It covers every address from E0:4E:7A:00:00:00 to E0:4E:7A:FF:FF:FF, or 16,777,216 addresses in total. It is also written E0-4E-7A.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in E0:4E:7A:00:00:00 that is E0:4E:7A — 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 Nanjing Qinheng Microelectronics Co., Ltd. located?

Nanjing Qinheng Microelectronics Co., Ltd. is listed at No.18, Ningshuang Road Nanjing Jiangsu CN 210012 in the IEEE OUI registry entry for E0:4E:7A. This is the address the organization registered with the IEEE, which may differ from its current operating address.

How many MAC prefixes does Nanjing Qinheng Microelectronics Co., Ltd. own?

Nanjing Qinheng Microelectronics Co., Ltd. holds 17 OUI prefixes in the IEEE registry, of which E0:4E:7A is one. A device made by Nanjing Qinheng Microelectronics Co., Ltd. could carry a MAC address from any of them.

Nanjing Qinheng Microelectronics Co., Ltd.

MAC address prefix E0:4E:7A is registered to Nanjing Qinheng Microelectronics Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with E0:4E:7A has a network interface built by Nanjing Qinheng Microelectronics 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 E0:4E:7A:00:00:00 to E0:4E:7A:FF:FF:FF.

OUI prefix: E0:4E:7A
Hyphen form: E0-4E-7A
MAC range: E0:4E:7A:00:00:00 – E0:4E:7A:FF:FF:FF
Addresses in block: 16,777,216
Organization: Nanjing Qinheng Microelectronics Co., Ltd.
Address: No.18, Ningshuang Road Nanjing Jiangsu CN 210012
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 Nanjing Qinheng Microelectronics Co., Ltd.

Nanjing Qinheng Microelectronics Co., Ltd. holds 17 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.

2024-02-15Assigned to "Nanjing Qinheng Microelectronics Co., Ltd."
archived source →
2026-07-17Assigned to "Nanjing Qinheng Microelectronics Co., Ltd."

Nearby in the registry

The prefixes assigned immediately before and after E0:4E:7A:

FAQ

Which company owns MAC address prefix E0:4E:7A?: MAC address prefix E0:4E:7A is registered to Nanjing Qinheng Microelectronics Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E0:4E:7A has a network interface built by Nanjing Qinheng Microelectronics Co., Ltd..
What is the OUI E0:4E:7A?: E0:4E:7A is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Nanjing Qinheng Microelectronics Co., Ltd.. It covers every address from E0:4E:7A:00:00:00 to E0:4E:7A:FF:FF:FF, or 16,777,216 addresses in total. It is also written E0-4E-7A.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in E0:4E:7A:00:00:00 that is E0:4E:7A — 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 Nanjing Qinheng Microelectronics Co., Ltd. located?: Nanjing Qinheng Microelectronics Co., Ltd. is listed at No.18, Ningshuang Road Nanjing Jiangsu CN 210012 in the IEEE OUI registry entry for E0:4E:7A. This is the address the organization registered with the IEEE, which may differ from its current operating address.
How many MAC prefixes does Nanjing Qinheng Microelectronics Co., Ltd. own?: Nanjing Qinheng Microelectronics Co., Ltd. holds 17 OUI prefixes in the IEEE registry, of which E0:4E:7A is one. A device made by Nanjing Qinheng Microelectronics Co., Ltd. could carry a MAC address from any of them.