San Marino Phone Number Format

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

Number Format Overview

Phone numbers in San Marino use the international country code +378. When dialing from outside San Marino, you must include this country code before the local number.

International Format

+378 [area code] [local number]

From the United States

011 378 [area code] [local number]

When dialing a number within San Marino, local dialing rules apply. You may need to include a trunk prefix (often 0) before the area code for domestic calls, but you should omit this prefix when dialing internationally.

Mobile vs. Landline Numbers

Mobile Numbers

Mobile phone numbers in San Marino typically:

Begin with specific mobile prefixes
May have a different length than landline numbers
Are often 8-10 digits after the country code

+378 XX XXXX XXXX

Landline Numbers

Landline numbers in San Marino typically:

Start with a geographic area code
Area codes identify the city or region
Total length varies by area code

+378 (area) XXXX XXXX

Example Phone Numbers

These are example formats only and are not real phone numbers:

Type	Local Format	International Format	From US
Landline (San Marino)	`(0XX) XXXX XXXX`	`+378 XX XXXX XXXX`	`011 378 XX XXXX XXXX`
Mobile	`0XXX XXX XXXX`	`+378 XXX XXX XXXX`	`011 378 XXX XXX XXXX`
Toll-Free	`0800 XXX XXXX`	`+378 800 XXX XXXX`	`011 378 800 XXX XXXX`

Dialing Tips

Remove the leading zero: When dialing internationally, drop the trunk prefix (usually 0) that is used for domestic calls in San Marino.
Use the + notation: From a US mobile phone, use +378 instead of 011 378.
Verify the number length: Make sure you have the correct number of digits. If your call does not connect, check whether you need to add or remove an area code digit.
Save contacts in international format: Always store phone numbers with the full +378 prefix so they work from any country.

San Marino Quick Info

Country Code	+378
ISO Code	SM
Capital	San Marino
International Prefix	011 (from US)

Full Country Profile

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