Overview#Country Calling Code are a component of the international Telephone Numbering Plan and are prefixes for the member countries or regions of the International Telecommunication Union (ITU) and are defined by the ITU-T in standards E.123 and E.164.
Country Calling Code, by convention, International Telephone Numbers are represented by prefixing the Country Calling Code with a plus sign (+), which also indicates to the subscriber that the local international call prefix must first be dialed.
Ordered by code#Each Country Calling Code's first digit directs to these broad areas:
- +1: North American Numbering Plan
- +2: mostly Africa
- +3–4: Europe
- +5: Americas outside the NANP
- +6: Southeast Asia and Oceania
- +7: Parts of the former Soviet Union
- +8: East Asia and special services
- +9: mostly southern Asia