The country code 86 is assigned to China. It is used when making international calls to China from another country. When dialing a telephone number in China from abroad, the country code 86 is followed by an area code and then the phone number. The area code is usually 2-4 digits long and is required when calling a landline number from another area within China or from a Chinese mobile phone. However, when calling from a landline in the same area or from abroad, the area code is not required.