Do you ever get a phone call from an area code that you don't recognize? Country Codes app offers you the country codes from all countries and regions around the world. The app will allow you to search prefixes through the country/region name, or countries/regions through the prefix.
Country calling codes or country dial-in codes are telephone number prefixes for reaching telephone subscribers in the networks of the member countries or regions of the International Telecommunication Union (ITU).
Country codes are a component of the international telephone numbering plan, and are necessary only when dialing a telephone number to establish a call to another country. Country codes are dialed before the national telephone number. By convention, international telephone numbers are represented by prefixing the country code with a plus sign (+), which also indicates to the subscriber that the local international call prefix must first be dialed.