Why is the area code of Beijing 0 10?

Actually, the previous area code was not 0 10, but 0 1. It was changed to 0 10 before the introduction of cellular mobile digital telephone (G network mobile telephone). Because the G network starts with 139 at first, you need to add 0 to the G network mobile phone in different places, and the result will enter the exchange office in Beijing, so the area code is changed to 0 10.

Extension:

First of all, because the landline appeared before the mobile phone, the number was assigned before the mobile phone. Therefore, in the long-distance telephone area code of China, the first 0 is the domestic long-distance telephone access code crown of China (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 so-called 0 is a prefix, which means that "0" is actually not an area code. For example, it is easy to understand: for example, the area code of Beijing is actually 10, and the 0 at the beginning indicates that it is a domestic call. For a very simple example, many international hotels or websites are +86- 10-OOXX, which means that I am in Beijing, China. When someone asks for the area code of Beijing, they can give a professional answer, which is 10.

The long-distance area code prefixed with 1 after 0 is unique in China: Beijing. (0) 10 stands for the capital, which is beyond reproach. The next two prefixes are: (0)20 Guangzhou, (0)2 1 Shanghai, (0)22 Tianjin, (0)23 Chongqing, (0)24 Shenyang, 0)25 Nanjing, (0)27 Wuhan, (0)28 Chengdu and (0)29 Xi 'an.