San Marino Phone Number Format

Country code +378 — Complete guide to San Marino phone number formats, mobile and landline structures, and area codes.

How San Marino Phone Numbers Are Written

Phone numbers in San Marino have 8 digits for mobiles and 10 for landlines after the country code +378. There is no trunk prefix to remove: the number is written the same way at home (66 XX XX XX) and after the country code (+378 66 XX XX XX).

Country code	+378
Digits after +378	8 digits for mobiles and 10 for landlines
Trunk prefix (domestic calls)	None
Mobile numbers start with	61 or 66
Exit code (to call abroad from San Marino)	00
Dial from the US	011 378 66 XX XX XX

Mobile vs. Landline Numbers

Mobile numbers

8 digits after +378, starting with 61 or 66.

66 XX XX XX at home

+378 66 XX XX XX international

Landline numbers

10 digits after +378.

0549 XXXXXX at home

+378 0549 XXXXXX international

San Marino Number Types

Type	Starts with	Written at home	International	From the US
Mobile	61 or 66	`66 XX XX XX`	`+378 66 XX XX XX`	`011 378 66 XX XX XX`
Landline	05	`0549 XXXXXX`	`+378 0549 XXXXXX`	`011 378 0549 XXXXXX`
Premium rate	71 or 77–78	`71 XX XX XX`	`+378 71 XX XX XX`	`011 378 71 XX XX XX`
VoIP	—	`58 XX XX XX`	`+378 58 XX XX XX`	`011 378 58 XX XX XX`

X stands for any digit. Source: libphonenumber metadata (phonenumbers 9.0.40), Google's open numbering data.

Checking a number from San Marino? The phone number checker tells you if it is valid, mobile or landline, and gives its international format.

Dialing Tips

Keep every digit: San Marino numbers have no trunk prefix, so dial them after +378 exactly as they are written locally.
Use the + notation: From a US mobile phone, use +378 instead of 011 378.
Verify the number length: Numbers in San Marino have 8 digits for mobiles and 10 for landlines after +378. If your call does not connect, check that no digit is missing or doubled.
Save contacts in international format: Always store phone numbers with the full +378 prefix so they work from any country.

San Marino Phone Number FAQ

How many digits does a phone number in San Marino have?

Phone numbers in San Marino have 8 digits for mobiles and 10 for landlines after the country code +378.

What do mobile numbers in San Marino start with?

Mobile numbers in San Marino start with 61 or 66, for example 66 XX XX XX.

How do I write a phone number from San Marino in international format?

Start with +378, then the national number. For example, a mobile number written 66 XX XX XX at home becomes +378 66 XX XX XX. From a US landline, dial 011 378 66 XX XX XX.

How do I call the US from San Marino?

Dial the exit code 00, then 1 and the 10-digit US number: 00 1 XXX XXX XXXX. From a mobile phone you can use + instead of 00: +1 XXX XXX XXXX.

San Marino Quick Info

Country Code +378

ISO Code SM

Capital San Marino

International Prefix 011 (from US)

Full Country Profile

Nearby Countries