Jiangsu Hetai Intelligent Control Technology Co., Ltd
MAC address prefix 74:51:8F is registered to Jiangsu Hetai Intelligent Control Technology Co., Ltd in the IEEE OUI registry. Any device whose MAC address begins with 74:51:8F has a network interface built by Jiangsu Hetai Intelligent Control Technology 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 74:51:8F:00:00:00 to 74:51:8F:FF:FF:FF.
- OUI prefix
- 74:51:8F
- Hyphen form
- 74-51-8F
- MAC range
- 74:51:8F:00:00:00 – 74:51:8F:FF:FF:FF
- Addresses in block
- 16,777,216
- Organization
- Jiangsu Hetai Intelligent Control Technology Co., Ltd
- Address
- BUILDING 11, CHENG SHENG SCIENCE AND TECHNOLOGYPARK, NO.2 BOSIDENG AVENUE, GAOYOU CITY Gaoyou Jiangsu CN 225600
- 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 (1)
The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.
- 2026-08-13Assigned to "Jiangsu Hetai Intelligent Control Technology Co., Ltd"
Nearby in the registry
The prefixes assigned immediately before and after 74:51:8F:
- Arrive Systems Inc.74:4D:79
- Espressif Inc.74:4D:BD
- Sonim Technologies, Inc74:4D:DC
- shenzhen Amos Electronics Co.,Ltd74:4F:80
- New H3C Technologies Co., Ltd74:50:4E
- HUAWEI TECHNOLOGIES CO.,LTD74:50:CD
- Xiaomi Communications Co Ltd74:51:BA
- Hengtai Intelligent Technology (Zhongshan) Co., LTD74:52:CE
- COMMSEN CO., LIMITED74:53:27
- ACL Airshop BV74:53:A8
- SHENZHEN FAST TECHNOLOGIES CO.,LTD74:54:27
- hangzhou zhiyi communication co., ltd74:54:6B
FAQ
- Which company owns MAC address prefix 74:51:8F?
- MAC address prefix 74:51:8F is registered to Jiangsu Hetai Intelligent Control Technology Co., Ltd in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 74:51:8F has a network interface built by Jiangsu Hetai Intelligent Control Technology Co., Ltd.
- What is the OUI 74:51:8F?
- 74:51:8F is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Jiangsu Hetai Intelligent Control Technology Co., Ltd. It covers every address from 74:51:8F:00:00:00 to 74:51:8F:FF:FF:FF, or 16,777,216 addresses in total. It is also written 74-51-8F.
- How do I find the manufacturer of a MAC address?
- Take the first three octets of the address — in 74:51:8F:00:00:00 that is 74:51:8F — 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 Jiangsu Hetai Intelligent Control Technology Co., Ltd located?
- Jiangsu Hetai Intelligent Control Technology Co., Ltd is listed at BUILDING 11, CHENG SHENG SCIENCE AND TECHNOLOGYPARK, NO.2 BOSIDENG AVENUE, GAOYOU CITY Gaoyou Jiangsu CN 225600 in the IEEE OUI registry entry for 74:51:8F. This is the address the organization registered with the IEEE, which may differ from its current operating address.