Country codes are in mostly times created by few letters or numbers that represent geographical codes (geocodes) of countries that use certain country code, it is in use in data processing and communications. There are few different systems created for this. The most known is ISO 3166-1. The term country code in many times refers to international dialing codes, the E.164 country calling codes.
Images for kids
Map of Oceania with country codes.
Country code Facts for Kids. Kiddle Encyclopedia.