How To Call Monaco From US: Updated For 2025
Quick Answer
To call Monaco from the United States:
- Landline:
011 + 377 + Monacan Number(Typically 8 digits, often starting with9Xfor fixed lines). - Mobile:
011 + 377 + Monacan Mobile Number(Typically 8 digits, often starting with6X).
Examples:
- For a Monacan landline (e.g., starting with 92):
011 + 377 + 92 XX XX XX - For a Monacan mobile phone (e.g., starting with 68):
011 + 377 + 68 XX XX XX
Monaco is on Central European Time (CET, UTC+1) / Central European Summer Time (CEST, UTC+2). This is generally 6 hours ahead of US Eastern Time (ET).
How to Dial Monaco from the US
How to Call a Landline in Monaco
To call a Monacan landline from the United States, follow these steps:
- Step 1 – Dial the US exit code: Start by dialing
011. - Step 2 – Dial Monaco's country code: Next, key in
377. - Step 3 – Dial the 8-digit Monacan landline number: Monacan fixed-line numbers are typically 8 digits long and often start with the digit
9(e.g.,9X XX XX XX). Monaco uses a closed numbering plan, so no separate area code is dialed after the country code. Older, shorter numbers may exist but are less common.
For example, to call a Monacan landline number 92 12 34 56, you would dial: 011 377 92123456
How to Call a Mobile Phone in Monaco
Calling a Monacan mobile phone from the US involves these steps:
- Step 1 – Dial the US exit code: Start by dialing
011. - Step 2 – Dial Monaco's country code: Next, key in
377. - Step 3 – Dial the 8-digit Monacan mobile number: Monacan mobile numbers are typically 8 digits long and begin with the digit
6(e.g.,6X XX XX XX).
For example, if the Monacan mobile number is 68 12 34 56, you would dial: 011 377 68123456 from the US.
Understanding Monacan Phone Numbers
Monaco uses the country code +377. It operates on a closed numbering plan, where all national significant numbers (NSN) are typically 8 digits long after the country code. There are no separate regional area codes to dial after +377.
Landline Numbers
- Format from US:
011 + 377 + 9X XX XX XX(or other 8-digit number) - Fixed-line numbers are generally 8 digits long and most commonly start with the digit
9. Older numbers might be shorter (4-6 digits) but are less common.
Mobile Numbers
- Format from US:
011 + 377 + 6X XX XX XX - Mobile numbers in Monaco are 8 digits long after the country code
+377and typically start with the digit6.
Monacan Numbering Plan (No Separate Area Codes)
When calling Monaco from the US, after dialing 011 + 377, you dial the subscriber's complete 8-digit national number. Monaco employs a closed numbering system, meaning area codes are integrated and not dialed separately.
The first digit of the 8-digit number indicates the type of service:
| Starting Digit(s) of 8-digit Number (after +377) | Service Type / General Association |
|---|---|
9X XX XX XX | Fixed Lines (Landlines) - e.g., 90, 92, 93, 97, 98, 99 are common. |
6X XX XX XX | Mobile Phones (e.g., 60, 62, 64, 66, 68, 69) |
80 XX XX XX | Toll-Free numbers |
4X XX XX XX | Historically some fixed lines; less common now or repurposed. |
Note: While fixed lines generally start with 9 and mobiles with 6, always confirm the exact 8-digit number.
Monacan Mobile Phone Prefixes
Monacan mobile phone numbers are 8 digits long after the +377 country code and typically begin with the digit 6. Specific ranges are allocated to operators.
| Operator (Primary) | Mobile Prefixes (Start of 8-digit number after +377) |
|---|---|
| Monaco Telecom | 603, 607, 608, 621, 640, 644, 649, 660, 678, 680 (examples) |
*This indicates common ranges for Monaco Telecom, the primary mobile operator. The full number is always 8 digits after +377.
Time Difference
Monaco operates on Central European Time (CET), which is UTC+1 during standard time. During summer, Monaco observes Central European Summer Time (CEST), which is UTC+2. This change typically occurs from the last Sunday in March to the last Sunday in October.
The time difference compared to the US East Coast (ET):
- When the US East Coast is on Eastern Daylight Time (EDT, UTC-4) and Monaco is on CEST (UTC+2): Monaco is 6 hours ahead of ET. (e.g., 12 PM EDT is 6 PM in Monaco).
- When the US East Coast is on Eastern Standard Time (EST, UTC-5) and Monaco is on CET (UTC+1): Monaco is 6 hours ahead of ET. (e.g., 12 PM EST is 6 PM in Monaco).
Monaco's Phone System
Monaco boasts a highly advanced and modern telecommunications system, primarily operated by Monaco Telecom. The infrastructure is fully digital with extensive fiber-optic deployment, providing residents and businesses with high-speed internet, fixed-line telephony, and mobile services. Monaco Telecom was the first operator to launch a nationwide 5G network. While it holds a monopoly on fixed-line, internet, and TV services through a government concession, the mobile market is technically open to competition, though Monaco Telecom remains the dominant force. The system is integrated with global networks and maintains high standards of service.
Best Times to Call
Considering Monaco is typically 6 hours ahead of US Eastern Time (ET):
- For business calls from the US East Coast, a good window is morning ET. For example, 9 AM - 11 AM ET would correspond to 3 PM - 5 PM in Monaco.
- Typical business hours in Monaco are Monday to Friday, approximately 9:00 AM to 6:00 PM CET/CEST.
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- Dial the local access number provided with your card.
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- Dial the full international number for Monaco:
011 + 377 + Monacan Number(8-digit number).
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