San Marino country code, +378 explained.
Everything you need to call San Marino with Twiching — full dialing format, step-by-step guide, and Tier-1 CLI routes that land every call.
San Marino
San Marino City · Europe
· COUNTRY INFO · VERIFIED
- ISO Alpha-2
- SM
- Capital
- San Marino City
- Region
- Europe
- Timezone
- UTC+1
· DIALING GUIDE · VERIFIED
FULL DIAL FORMAT
011 · +378 · XXXXXXXX
How San Marino numbers break down
A complete number to San Marino follows this pattern. Twiching adds the exit and country codes automatically when you dial from the app.
EXIT CODE
Dial from the US/Canada to leave the country.
COUNTRY CODE
Routes the call directly into San Marino.
LOCAL NUMBER
The subscriber's local number.
COMPLETE NUMBER FORMAT
011 · +378 · XXXXXXXX
San Marino on the map
San Marino City · Europe
ROUTE
Tier-1 Direct
CLI
Verified
ASR
60%+ min
How to call San Marino
Click any step — watch the full dial string build piece by piece.
FULL NUMBER FORMAT
011 · +378 · XXXXXXXX
Twiching automatically adds the exit and country codes — just enter the local number.
San Marino —
connected across every carrier.
191
Countries in directory
SAN MARINO INCLUDED
99.97%
Call delivery rate
STIR/SHAKEN
500+
Carrier interconnects
TIER-1 DIRECT
60%+
Guaranteed ASR
REAL-TIME ROUTING
San Marino
Europe · SM
San Marino numbering plan & how to dial
San Marino's plan is closed: dial country code +378 followed directly by a 8-digit number. There's no area code layer to account for.
Mobile coverage in San Marino comes from 3 major networks — TIM San Marino, Wind (roaming), Vodafone (roaming) — with internet penetration at 97%. VoIP is permitted and regulated by AASS (Azienda Autonoma di Stato per i Servizi) / AGCOM. Language (Italian) and currency (EUR) both matter here for IVR, SMS, and scheduling support around local business hours.
Most European numbering plans follow ITU-T E.164 with a national trunk prefix that is dropped for international dialing, and cross-border VoIP is widely supported across the region.
Skipping the exit code
Reaching San Marino from the US requires the 011 exit code ahead of +378 — skip it and the call won't connect.
Adding an area code that doesn't exist
San Marino uses a closed plan — dial the +378 country code then the 8-digit subscriber number directly, with no area code.
Ignoring the time difference
UTC+1 governs local business hours in San Marino; confirm the time there before placing the call.
Permitted — AGCOM (Italy) / AASS regulated
Regulated by AASS (Azienda Autonoma di Stato per i Servizi) / AGCOM
- San Marino telecommunications are closely aligned with Italian regulations and AGCOM oversight.
- VoIP services must comply with San Marino's Law on Electronic Communications, mirroring EU directives.
- Emergency service access (113/118) is required for all VoIP operators providing services in San Marino.
US → San Marino
$0.020/min
per minute
San Marino → US
$0.015/min
per minute
More in Europe
Business calling to San Marino
Local SM caller ID
Present a San Marino +378 number so prospects in San Marino City and nationwide recognise the call and are more likely to answer.
Europe outbound & support
Run sales and support lines into San Marino over Tier-1 routes that interconnect with networks like TIM San Marino.
Follow-the-sun coverage
Staff San Marino hours (UTC+1) with routing that sends calls to the right team at the right local time.
FAQ
Calling San Marino — frequently asked questions
3 major networks serve San Marino: TIM San Marino, Wind (roaming), Vodafone (roaming). Twiching interconnects directly with these carriers over Tier-1 routes rather than relying on third-party transit.
A recognisable +378 number tends to get answered more often than an unfamiliar international one — that's the main reason to present local caller ID in San Marino. Unknown foreign numbers are frequently screened or ignored, which can quietly suppress answer rates on outbound sales and support calls.
The country code for San Marino is +378. To call San Marino from the United States, dial 011, then 378, then the local number. Twiching adds the 011 and +378 automatically when you dial from the app, so you only need to enter the local number itself.
San Marino is in Europe. Most European numbering plans follow ITU-T E.164 with a national trunk prefix that is dropped for international dialing, and cross-border VoIP is widely supported across the region.
San Marino runs on UTC+1. Knowing this helps schedule calls and support hours so they land during the local business day rather than the middle of the night for the person picking up.
Yes. Twiching provisions San Marino virtual numbers with local +378 caller ID for calls and, where supported, SMS. A recognisable local number tends to get answered more often than an unfamiliar international one, which makes it useful for sales, support, and building local market presence.
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