Telephone numbers are divided into fixed telephone numbers and mobile telephone numbers.

It depends on the phone number: generally 7-8 digits.

To make a long-distance fixed telephone call, you need to dial the area code+fixed telephone number. Daily enterprises, organizations, factories, mines and institutions set designated numbers for internal communications such as fixed telephones or mobile phones, which are also equivalent to the number and name of each telephone, while the intranet may not have an area code or be that long. Only 4 digits are needed to set up the intranet required by the company.

In the early 1990s, there was a shortage of telephone number resources in big cities in Beijing. The fixed telephone number was upgraded to 3 digits, and the complete telephone number was changed from 6 digits to 7 digits.

Part number segment:

China mobile number segment: 134(0-8), 135, 136, 137, 138, 139, 147. 172、 178、 182、 183、 184、 187、 188、 195、 197、 198。

China Unicom numbers: 130, 13 1, 132, 145, 155, 156, 166.

China electric signal section: 133, 149, 153, 180,18, 189, 173.

China Radio and TV Station: 192.