To Dial Sao Tome and Principe, you should start with dialing the ST international code +239 then the appropriate area code and the local number.

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How to dial Sao Tome and Principe
Example phone dialings for Sao Tome and Principe
Fixed Line222 1234+239 222 1234
Mobile981 2345+239 981 2345
Fixed Line Or Mobile222 1234+239 222 1234