1 and 023 are the telephone area codes of Chongqing (municipality directly under the central government).

2. Among the long-distance telephone area codes familiar to China people, the first 0 is the domestic long-distance telephone access code crown in Chinese mainland, and the area code is after 0; However, for more than 20 years after the current area code model was determined, 0 and the following area code were habitually called telephone area code side by side.

The long-distance area code prefixed with 1 after 3.0 is unique in China: Beijing. (0) 10 stands for the capital, which is beyond reproach.

023 is the area code of Chongqing, and the telephone numbers starting with 023 in the caller ID are usually dialed from Chongqing. If it is in the form of 023 +8 digits, it is likely to come from a fixed telephone, but it is not determined by 100%. It may also be the special service number, VoIP, fax number of the telecom operator or even a device that can set its own display number.

For example, what number is 12340?

The "023- 12340" hotline is dedicated by Chongqing Social Situation and Public Opinion Survey Center, which is mainly used to collect people's opinions and attitudes on public affairs and reflect people's interests in a timely manner.

Since the opening of "023- 12340", Chongqing Social Situation and Public Opinion Survey Center has carried out a large number of public opinion surveys. According to statistics, millions of people have expressed their interest and suggestions on the work of the Party committee and government through the "023- 12340" special hotline.