At present, the country and region codes used in the list are formulated by the international standard ISO3 166, but they are not completely consistent, using 1 to three (even four special cases) English letter combinations. The original intention of changing this code is to consider that when a foreign vehicle enters another country, in addition to copying the license plate number of the original nationality, it also uses the nationality code to identify its registered country.
South Korea is surrounded by the demilitarized zone along the 38th parallel, surrounded by the sea on three sides, the Yellow Sea in the west, the Korean Strait in the southeast, the Sea of Japan in the east and North Korea. . The mountainous area accounts for about two-thirds of the area of the Korean peninsula, and the terrain is diverse, with low hills and plains intertwined.
relevant knowledge
An international number consists of a national number and a domestic valid number. If a country or a group of overseas territories is represented by a country number in principle, the country number should be at least 3 digits for more than 100 geographical units on the earth. On the other hand, in order to shorten the digits of international numbers as much as possible, their digits should be different according to the size of each country.
The area code dialed when making an international long-distance call, the official name should be the country (region) code, which is used to identify the name of a country or a specific region. The area codes of all countries or regions in the world are managed and allocated by the International Telecommunication Union according to the standard E. 164. For example, ITU designated the country code of China as 86, the area code of Hongkong as 852 and the area code of Macau as 853.
Baidu Encyclopedia-Country Code