A telephone country code is a numerical prefix used to identify a specific country or region in international dialing. For example:
+1: United States, Canada, and several Caribbean nations
+44: United Kingdom
+91: India
+81: Japan
To make an international call, you need to dial the exit code (e.g., 00 or +) of your country, followed by the country code of the destination, then the area code (if applicable), and the local number.