Country calling code
+378 San Marino country code
San Marino’s international calling code is +378. To call a San Marino number from another country, dial your exit code, then 378, then the local number.
- Calling code
- +378
- ISO 3166 code
- SM · 674
- Exit code (calling out)
- 00
- Trunk prefix (domestic)
- None
- Number length
- 8–10 digits
- Time zones
- San Marino
- Local time
- —
Number formats and examples are generated from libphonenumber-js numbering-plan metadata. They describe numbering rules, not a verified active subscriber or a phone’s current location. For an individual number, try the free format lookup.
How to call San Marino
| Calling from | Dial |
|---|---|
| A mobile phone, anywhere | +378 66 66 12 12 |
| United States & Canada | 011 378 66 66 12 12 |
| UK, Europe & most countries | 00 378 66 66 12 12 |
| Australia | 0011 378 66 66 12 12 |
| Inside San Marino | 66 66 12 12 |
San Marino does not use a trunk prefix, so the number you dial at home is the same one you dial after +378.
San Marino phone number format
A sample mobile number in San Marino is written +378 66 66 12 12 internationally, 66 66 12 12 locally, and +37866661212 in the E.164 format that apps and websites store. Numbers are 8–10 digits long after the country code.
Not sure where a number is from? Paste it into our free phone number lookup to see the country, line type and correct format.
Calling abroad from San Marino
To call another country from a San Marino landline, start with the exit code 00, then the destination country code. On a mobile phone, holding 0 to type + works everywhere and replaces the exit code.
Missed call from +378?
If you don’t know anyone in San Marino, be careful with short missed calls from international numbers. “One-ring” scams hope you call back a premium-rate line. Don’t return the call, don’t share codes sent by SMS, and block the number if it keeps calling. A genuine contact will usually leave a message or text.
Frequently asked questions
Which country uses the +378 code?
+378 is the international calling code of San Marino (SM). No other country uses it.
How do I call San Marino from the United States?
Dial 011 (the US exit code), then 378, then the local number without any prefix. From a mobile phone you can simply type +378 66 66 12 12.
How many digits are in a San Marino phone number?
National numbers in San Marino are 8–10 digits long after the +378 country code. A typical mobile number looks like +378 66 66 12 12.
Can I find the location of a +378 number?
Not from the number alone. Enter the number in AI Family Locator and send a location request. Live GPS location appears only after the owner installs the app and approves sharing. A number lookup shows only numbering details, not a current location.