When making a long distance call in Chinese mainland, you need to dial 0 first, and then the three-digit Suzhou area code. The three-digit area code represents the city in communication. Therefore, there will be some city citizens who have a strong three-digit area code to show off their city area code, which means that the three-digit area code can show the status of the city.

The Development History of China Area Code

In the 1990s, computer-controlled program-controlled switches were widely used in China. This multi-stage tandem system for long-distance calls became a thing of the past, and local telephone networks could communicate without going through the next tandem center.

However, the area code format of that year was retained. Later, the C4 network merged, and the four-digit area code was gone. In this way, the three-digit area code with the second even number will obtain the number resources, ensuring that each municipal administrative unit has at least one three-digit area code. Except for Taiwan Province Province, all localities have used the original spare number resources to fill the vacancy of number resources.

Therefore, the numbers after 63x appear in the area codes of Shandong, Guangdong and Yunnan, and the remaining 898, 899 and 890 in the Tibet area code become Hainan area codes. By May of 20001year, Hainan Province had merged with C3 network, leaving only 898 companies. Due to the special long-distance dialing method of GSM mobile phone, the area code of Beijing has to be changed to 10.