Nanjing Qinheng Microelectronics Co., Ltd.
MAC address prefix 0C:3D:5E is registered to Nanjing Qinheng Microelectronics Co., Ltd. in the IEEE OUI registry. Any device whose MAC address begins with 0C:3D:5E 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 0C:3D:5E:00:00:00 to 0C:3D:5E:FF:FF:FF.
- OUI prefix
- 0C:3D:5E
- Hyphen form
- 0C-3D-5E
- MAC range
- 0C:3D:5E:00:00:00 – 0C:3D:5E: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.
- 2025-08-23Assigned 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 0C:3D:5E:
- eero inc.0C:39:3D
- Observator instruments0C:39:56
- New H3C Technologies Co., Ltd0C:3A:FA
- Apple, Inc.0C:3B:50
- Dome Imaging Inc0C:3C:65
- Universal Global Scientific Industrial., Ltd0C:3C:CD
- Apple, Inc.0C:3E:9F
- Ruichi Auto Technology (Guangzhou) Co., Ltd.0C:41:01
- Microsoft Corporation0C:41:3E
- HUAWEI TECHNOLOGIES CO.,LTD0C:41:E9
- Mellanox Technologies, Inc.0C:42:A1
- Silicon Laboratories0C:43:14
FAQ
- Which company owns MAC address prefix 0C:3D:5E?
- MAC address prefix 0C:3D:5E is registered to Nanjing Qinheng Microelectronics Co., Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 0C:3D:5E has a network interface built by Nanjing Qinheng Microelectronics Co., Ltd..
- What is the OUI 0C:3D:5E?
- 0C:3D:5E 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 0C:3D:5E:00:00:00 to 0C:3D:5E:FF:FF:FF, or 16,777,216 addresses in total. It is also written 0C-3D-5E.
- How do I find the manufacturer of a MAC address?
- Take the first three octets of the address — in 0C:3D:5E:00:00:00 that is 0C:3D:5E — 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 0C:3D:5E. 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 0C:3D:5E is one. A device made by Nanjing Qinheng Microelectronics Co., Ltd. could carry a MAC address from any of them.