Qingdao Intelligent&Precise Electronics Co.,Ltd.
MAC address prefix E4:E3:3D is registered to Qingdao Intelligent&Precise Electronics Co.,Ltd. in the IEEE OUI registry. Any device whose MAC address begins with E4:E3:3D has a network interface built by Qingdao Intelligent&Precise 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 E4:E3:3D:00:00:00 to E4:E3:3D:FF:FF:FF.
- OUI prefix
- E4:E3:3D
- Hyphen form
- E4-E3-3D
- MAC range
- E4:E3:3D:00:00:00 – E4:E3:3D:FF:FF:FF
- Addresses in block
- 16,777,216
- Organization
- Qingdao Intelligent&Precise Electronics Co.,Ltd.
- Address
- No.218 Qianwangang Road Qingdao Shangdong CN 266510
- 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 Qingdao Intelligent&Precise Electronics Co.,Ltd.
Qingdao Intelligent&Precise Electronics Co.,Ltd. holds 22 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.
- 2025-02-27Assigned to "Qingdao Intelligent&Precise Electronics Co.,Ltd."archived source →
- 2026-07-17Assigned to "Qingdao Intelligent&Precise Electronics Co.,Ltd."
Nearby in the registry
The prefixes assigned immediately before and after E4:E3:3D:
- Hewlett Packard EnterpriseE4:DE:40
- Apple, Inc.E4:E0:A6
- Samsung Electronics Co.,LtdE4:E0:C5
- Texas InstrumentsE4:E1:12
- TCT mobile ltdE4:E1:30
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP.,LTDE4:E2:6C
- LEIFHEIT AGE4:E4:09
- Apple, Inc.E4:E4:AB
- Kiwibit Inc.E4:E6:08
- Tiandy Technologies Co.,LTDE4:E6:6C
- Hewlett PackardE4:E7:49
- SHENZHEN GONGJIN ELECTRONICS CO.,LTE4:EA:83
FAQ
- Which company owns MAC address prefix E4:E3:3D?
- MAC address prefix E4:E3:3D is registered to Qingdao Intelligent&Precise Electronics Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E4:E3:3D has a network interface built by Qingdao Intelligent&Precise Electronics Co.,Ltd..
- What is the OUI E4:E3:3D?
- E4:E3:3D is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Qingdao Intelligent&Precise Electronics Co.,Ltd.. It covers every address from E4:E3:3D:00:00:00 to E4:E3:3D:FF:FF:FF, or 16,777,216 addresses in total. It is also written E4-E3-3D.
- How do I find the manufacturer of a MAC address?
- Take the first three octets of the address — in E4:E3:3D:00:00:00 that is E4:E3:3D — 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 Qingdao Intelligent&Precise Electronics Co.,Ltd. located?
- Qingdao Intelligent&Precise Electronics Co.,Ltd. is listed at No.218 Qianwangang Road Qingdao Shangdong CN 266510 in the IEEE OUI registry entry for E4:E3:3D. This is the address the organization registered with the IEEE, which may differ from its current operating address.
- How many MAC prefixes does Qingdao Intelligent&Precise Electronics Co.,Ltd. own?
- Qingdao Intelligent&Precise Electronics Co.,Ltd. holds 22 OUI prefixes in the IEEE registry, of which E4:E3:3D is one. A device made by Qingdao Intelligent&Precise Electronics Co.,Ltd. could carry a MAC address from any of them.