What is the use of adding +86 before the number when sending a text message on a mobile phone?

SMS number before +86: Chinese mainland international telephone area code. International telephone area code, that is, the code assigned to a country or special administrative region by the International Telecommunication Union according to the E. 164 standard. All numbers are prefix numbers, which means that these numbers are used to "dial" the destination country or special administrative region. Each country also has a prefix "set aside" where it is located. * 852- China Hongkong; * 853-Macau, China; * 886- Taiwan Province Province, China.

Extended information The long-distance area codes of all countries and regions in the world are allocated according to the E. 164 standard and regional standard of the International Telecommunication Union. The world * * * is divided into 9 number areas, arranged from 1-9. 0 is a reserved number.

According to the regulations, the 1 area is the North American number planning area, and the long-distance codes of these countries are 00 1, such as the United States and Canada. The area code of Greenland is an exception, 00299. Area 2 is an African number area, and the telephone area code of all African countries begins with 002. There are also some figures in other regions.

Areas 3 and 4 are both European number areas, and most European countries use these two digits as codes. Region 5 is the country code area of Mexico and Central and South America. Region 6 is the country code area of Southeast Asia and Oceania. Region 7 is a part of the code areas of Russia and the former Soviet Union.

Area 8 is the East Asia area and special service number. For example, the long distance area code of China is 0086. Region 9 is the country code area of West Asia, South Asia and the Middle East.

References:

Baidu Encyclopedia-International Telephone Area Code

References:

People's Network-How are the area codes of countries and regions arranged?