How To Call Slovakia From US: Updated For 2025
Quick Answer
To call Slovakia (Slovak Republic) from the United States:
- Landline or Mobile:
011 + 421 + Slovak Number (9 digits)
Examples:
- For a Bratislava number (e.g., starting with 2):
011 + 421 + 2XX XXX XXX - For a Slovak mobile phone (e.g., starting with 9):
011 + 421 + 9XX XXX XXX
Slovakia 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 Slovakia from the US
How to Call a Landline in Slovakia
To call a Slovak landline from the United States, follow these steps:
- Step 1 – Dial the US exit code: Start by dialing
011. - Step 2 – Dial Slovakia's country code: Next, key in
421. - Step 3 – Dial the 9-digit Slovak landline number: Slovak landline numbers are 9 digits long. The Czech Republic uses a closed numbering plan, so no separate area code is dialed after the country code. The first digit(s) of the 9-digit number indicate the region or service type (e.g., Prague numbers typically start with
2). The leading domestic '0' is dropped for international calls.
For example, to call a Bratislava landline number 212 345 678, you would dial: 011 421 212 345 678
How to Call a Mobile Phone in Slovakia
Calling a Slovak mobile phone from the US involves these steps:
- Step 1 – Dial the US exit code: Start by dialing
011. - Step 2 – Dial Slovakia's country code: Next, key in
421. - Step 3 – Dial the 9-digit Slovak mobile number: Slovak mobile numbers are 9 digits long and typically begin with the digit
9(followed by operator-specific digits). The domestic leading '0' is dropped.
For example, if the Slovak mobile number is 905 123 456, you would dial: 011 421 905 123 456 from the US.
Understanding Slovak Phone Numbers
Slovakia uses the country code +421. It operates on a closed numbering plan, where all national phone numbers are 9 digits long after the country code. The leading `0` used in domestic dialing is dropped for international calls.
Landline Numbers
- Format from US:
011 + 421 + XXX XXX XXX(9-digit number) - Slovak landline numbers are 9 digits long. The first digit often indicates the geographical region:
2– Bratislava region3– Western Slovakia (e.g., Trnava, Nitra, Trenčín)4– Central Slovakia (e.g., Žilina, Banská Bystrica)5– Eastern Slovakia (e.g., Prešov, Košice)
Mobile Numbers
- Format from US:
011 + 421 + 9XX XXX XXX(9-digit number) - Slovak mobile numbers are also 9 digits long and typically start with the digit
9, followed by operator-specific prefixes.
Slovak Numbering Plan (No Separate Area Codes for Dialing)
When calling Slovakia from the US, after dialing 011 + 421, you dial the subscriber's complete 9-digit national number. The Slovak Republic employs a closed numbering system, meaning traditional regional area codes are integrated into the 9-digit number and are not dialed separately. The first digit provides a broad regional or service type indication.
| Starting Digit(s) of 9-digit Number (after +421) | Service Type / General Region Association (Fixed Lines) |
|---|---|
2XX XXX XXX | Fixed Lines - Bratislava Region (e.g., Bratislava, Malacky, Pezinok, Senec) |
3XX XXX XXX | Fixed Lines - Western Slovakia Region (e.g., Trnava, Nitra, Trenčín, Dunajská Streda, Galanta, Komárno, Levice, Nové Zámky, Senica, Topoľčany) |
4XX XXX XXX | Fixed Lines - Central Slovakia Region (e.g., Žilina, Banská Bystrica, Liptovský Mikuláš, Martin, Prievidza, Zvolen, Čadca, Dolný Kubín) |
5XX XXX XXX | Fixed Lines - Eastern Slovakia Region (e.g., Prešov, Košice, Bardejov, Humenné, Michalovce, Poprad, Spišská Nová Ves, Trebišov) |
6XX XXX XXX | Mobile Phones (Less common now, mostly migrated to 9xx) |
9XX XXX XXX | Mobile Phones (Primary range, e.g., 90x, 91x, 94x, 95x) |
Note: For fixed lines, the first digit gives a broad regional clue. Always dial the full 9-digit number.
Slovak Mobile Phone Prefixes
Slovak mobile phone numbers are 9 digits long after the +421 country code. They typically begin with the digit 9, followed by a second digit indicating the operator, and then 7 more digits (9XX XXX XXX).
| Operator (Primary Association) | Mobile Prefixes (First 3 digits after +421) |
|---|---|
| Orange Slovensko | 905, 906, 907, 908, 910, 911, 912, 914, 915, 916, 917, 918, 919 |
| Slovak Telekom (T-Mobile) | 901, 902, 903, 904, 910, 911, 912 (Note: 910-912 overlap due to porting/shared ranges) |
| O2 Slovakia | 900, 940, 944, 948, 949 |
| 4ka (SWAN Mobile) | 950, 951 |
| Other MVNOs / Services | Various prefixes, often starting with 9 |
*Mobile Number Portability is active in Slovakia, so the prefix does not always guarantee the current service provider.
Time Difference
Slovakia operates on Central European Time (CET), which is UTC+1 during standard time. During summer, it 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 Slovakia is on CEST (UTC+2): Slovakia is 6 hours ahead of ET. (e.g., 12 PM EDT is 6 PM in Slovakia).
- When the US East Coast is on Eastern Standard Time (EST, UTC-5) and Slovakia is on CET (UTC+1): Slovakia is 6 hours ahead of ET. (e.g., 12 PM EST is 6 PM in Slovakia).
Slovakia's Phone System
The Slovak Republic has a modern and well-developed telecommunications system, regulated by the Regulatory Authority for Electronic Communications and Postal Services (RÚ). The market was liberalized, leading to competition in both fixed-line and mobile services. Major mobile operators include Slovak Telekom (formerly T-Mobile), Orange Slovensko, O2 Slovakia, and 4ka (SWAN Mobile). These providers offer extensive 3G, 4G/LTE coverage, and are actively rolling out 5G networks. The fixed-line network has been largely digitized, with increasing availability of high-speed broadband through DSL and fiber optic technologies. The country follows the European Union's telecommunications framework.
Best Times to Call
Considering Slovakia is typically 6 hours ahead of US Eastern Time (ET):
- For business calls from the US East Coast, morning ET is generally suitable. For instance, 9 AM - 11 AM ET would correspond to 3 PM - 5 PM in Slovakia.
- Typical business hours in Slovakia are Monday to Friday, approximately 8:00/9:00 AM to 5:00/6:00 PM CET/CEST.
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- Dial the full international number for Slovakia:
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