Qingdao Intelligent&Precise Electronics Co.,Ltd.
MAC address prefix E8:51:77 is registered to Qingdao Intelligent&Precise Electronics Co.,Ltd. in the IEEE OUI registry. Any device whose MAC address begins with E8:51:77 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 E8:51:77:00:00:00 to E8:51:77:FF:FF:FF.
- OUI prefix
- E8:51:77
- Hyphen form
- E8-51-77
- MAC range
- E8:51:77:00:00:00 – E8:51:77: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 (1)
The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.
- 2026-07-17Assigned to "Qingdao Intelligent&Precise Electronics Co.,Ltd."
Nearby in the registry
The prefixes assigned immediately before and after E8:51:77:
- Nintendo Co., Ltd.E8:4E:CE
- Murata Manufacturing Co., Ltd.E8:4F:25
- Shenzhen Delos Electronic Co., LtdE8:4F:4B
- Huawei Device Co., Ltd.E8:4F:A7
- SAMSUNG ELECTRO-MECHANICS(THAILAND)E8:50:8B
- TSMART Inc.E8:51:6E
- Yeonhab Precision Co.,LTDE8:51:9D
- Guangzhou Shiyuan Electronic Technology Company LimitedE8:51:9E
- NEO Information Systems Co., Ltd.E8:54:84
- Samsung Electronics Co.,LtdE8:54:97
- WUXI FUNIDE DIGITAL CO.,LTDE8:55:40
- SAI Technology Inc.E8:55:B4
FAQ
- Which company owns MAC address prefix E8:51:77?
- MAC address prefix E8:51:77 is registered to Qingdao Intelligent&Precise Electronics Co.,Ltd. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with E8:51:77 has a network interface built by Qingdao Intelligent&Precise Electronics Co.,Ltd..
- What is the OUI E8:51:77?
- E8:51:77 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 E8:51:77:00:00:00 to E8:51:77:FF:FF:FF, or 16,777,216 addresses in total. It is also written E8-51-77.
- How do I find the manufacturer of a MAC address?
- Take the first three octets of the address — in E8:51:77:00:00:00 that is E8:51:77 — 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 E8:51:77. 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 E8:51:77 is one. A device made by Qingdao Intelligent&Precise Electronics Co.,Ltd. could carry a MAC address from any of them.