378 Country Code: San Marino (+378)
+378 is the country code for San Marino. If you searched "378 country code", "country code 378", "00378 country code", or "+378 country code" — they all refer to San Marino. The code is also called the 378 dialing code, 378 phone code, or 378 ISD code, and is assigned by the International Telecommunication Union (ITU) under the E.164 standard.
Below you will find the number format, trunk prefix, major city area codes, and dialing facts specific to San Marino (+378).
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San Marino Phone Number Format
International Format Example
San Marino does not use a trunk prefix, so domestic and international formats are effectively the same — just prepend +378.
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Frequently Asked Questions: San Marino Country Code
Which country is country code 378?
Country code 378 belongs to San Marino. The full international dialing code is +378, also written as 00378 when dialing from countries that use 00 as an international access code, or +378 when dialing from a mobile phone.
What is the country code for San Marino?
+378 is the international dialing code for San Marino, assigned by the ITU under E.164. The ISO 3166-1 alpha-2 code is SM.
Can I call San Marino from my browser?
Yes. Kinvo connects calls to San Marino via WebRTC directly from Chrome, Firefox, Safari, or Edge. No app download. Sign up, add credits from $5, and dial +378 followed by the local number.