Siemens Industrial Automation Products Ltd., Chengdu
MAC address prefix 4C:E7:05 is registered to Siemens Industrial Automation Products Ltd., Chengdu in the IEEE OUI registry. Any device whose MAC address begins with 4C:E7:05 has a network interface built by Siemens Industrial Automation Products Ltd., Chengdu. 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 4C:E7:05:00:00:00 to 4C:E7:05:FF:FF:FF.
- OUI prefix
- 4C:E7:05
- Hyphen form
- 4C-E7-05
- MAC range
- 4C:E7:05:00:00:00 – 4C:E7:05:FF:FF:FF
- Addresses in block
- 16,777,216
- Organization
- Siemens Industrial Automation Products Ltd., Chengdu
- Address
- Tianyuan Road No.99, High Tech Zone West Chengdu Sichuan Province CN 611731
- 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 Siemens Industrial Automation Products Ltd., Chengdu
Siemens Industrial Automation Products Ltd., Chengdu holds 5 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.
- 2023-07-11Assigned to "Siemens Industrial Automation Products Ltd., Chengdu"archived source →
- 2026-07-17Assigned to "Siemens Industrial Automation Products Ltd., Chengdu"
Nearby in the registry
The prefixes assigned immediately before and after 4C:E7:05:
- Motorola Mobility LLC, a Lenovo Company4C:E4:B6
- Tianjin Beebox Intelligent Technology Co.,Ltd.4C:E5:AE
- Apple, Inc.4C:E6:50
- HUAWEI TECHNOLOGIES CO.,LTD4C:E6:5E
- BUFFALO.INC4C:E6:76
- Apple, Inc.4C:E6:C0
- RailComm, LLC4C:E9:33
- New H3C Technologies Co., Ltd4C:E9:E4
- Shenzhen Skyworth Digital Technology CO., Ltd4C:EA:27
- IEEE Registration Authority4C:EA:41
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP.,LTD4C:EA:AE
- Intel Corporate4C:EB:42
FAQ
- Which company owns MAC address prefix 4C:E7:05?
- MAC address prefix 4C:E7:05 is registered to Siemens Industrial Automation Products Ltd., Chengdu in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 4C:E7:05 has a network interface built by Siemens Industrial Automation Products Ltd., Chengdu.
- What is the OUI 4C:E7:05?
- 4C:E7:05 is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Siemens Industrial Automation Products Ltd., Chengdu. It covers every address from 4C:E7:05:00:00:00 to 4C:E7:05:FF:FF:FF, or 16,777,216 addresses in total. It is also written 4C-E7-05.
- How do I find the manufacturer of a MAC address?
- Take the first three octets of the address — in 4C:E7:05:00:00:00 that is 4C:E7:05 — 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 Siemens Industrial Automation Products Ltd., Chengdu located?
- Siemens Industrial Automation Products Ltd., Chengdu is listed at Tianyuan Road No.99, High Tech Zone West Chengdu Sichuan Province CN 611731 in the IEEE OUI registry entry for 4C:E7:05. This is the address the organization registered with the IEEE, which may differ from its current operating address.
- How many MAC prefixes does Siemens Industrial Automation Products Ltd., Chengdu own?
- Siemens Industrial Automation Products Ltd., Chengdu holds 5 OUI prefixes in the IEEE registry, of which 4C:E7:05 is one. A device made by Siemens Industrial Automation Products Ltd., Chengdu could carry a MAC address from any of them.