Devices with MAC addresses that start with A4-CF-12 were manufactured by Espressif Inc.

Device Manufacturer
Espressif Inc.

Manufacturer Location
Room 204, Building 2, 690 Bibo Rd, Pudong New Area
Shanghai Shanghai 201203

Estimated Devices using A4-CF-12
16,256,250

Estimated Total Devices From Mfg
520,200,000