Vendor registration identifies the organization holding a block, not a specific device model, product line, or manufacturing date. This page combines every block IEEE has registered under this exact organization name; it doesn't mean every address in every listed block is currently shipping in a real device.
About Espressif Inc.
Espressif makes the ESP8266 and ESP32 families of Wi-Fi and Bluetooth chips. They are used in a huge range of low-cost smart home and hobbyist devices.
Devices that use these prefixes
- Smart plugs, bulbs and switches
- DIY and maker boards built on ESP8266 or ESP32
- Sensors and other low-cost IoT products
- White-label devices from many small brands
Randomized MAC addresses
ESP32 and ESP8266 devices use their factory MAC address by default; randomization only happens if the firmware author adds it.
Related companies
- Tuya Smart Inc.: smart home platform whose devices often use Espressif chips
Frequently asked questions
An Espressif MAC address is on my network. What is it?
Most likely a smart home or IoT gadget with an ESP chip inside. Because many brands use these chips, the prefix does not say which product it is. Check your router's DHCP list for the hostname.
Assignments by type
| Type | Count |
|---|---|
| MA-L | 355 |
Countries in IEEE's registration records
| Country | Blocks |
|---|---|
| 🇻🇬 British Virgin Islands | 256 |
| 🇨🇳 China | 99 |
Download this organization's blocks
Get just these assignments as CSV or JSON, generated fresh from the live registry on every request.
355 registered prefixes