Slovakia +421
To call Slovakia from abroad, dial your exit code (or +), then 421, then the local number without its leading 0. Written in full: +421 912 123 456.
The country calling code for Slovakia is +421. A number starting +421 or 00421 is a call to or from Slovakia. From abroad: +421 912 123 456.
To call Slovakia from abroad, dial your exit code (or +), then 421, then the local number without its leading 0. The +421 code identifies the country; the following digits identify the line (landline or mobile).
How to call Slovakia from abroad
011 421 912 123 45600 421 912 123 4560011 421 912 123 456+421 912 123 456912 123 456 is a real-format Slovakia mobile number (example from the ITU-T numbering plan): replace it with the number you were given, without its leading 0.
Slovakia area codes
In Slovakia, landlines usually include an area code after +421 (without its leading 0). Mobiles have no area code.
Number format
02 212 345 67from abroad+421 2 212 345 670912 123 456from abroad+421 912 123 456Landline numbers in Slovakia have 6 or 7 or 9 digits after the country code; mobile numbers have 9 digits. The national prefix 0 is only dialled inside the country — drop it after +421.
Calling abroad from Slovakia
To call another country from Slovakia, dial the exit code 00 (or + on a mobile), then the country code, then the number. From Slovakia to the United States, for example: 00 1 201 555 0123.
A Slovakia number in international format is written +421 …. The + stands for the exit prefix (00 in much of the world, 011 in North America). Switching to international format, drop the leading 0.
Cheapest ways to call Slovakia
With internet on both ends, apps like WhatsApp, Signal or FaceTime call Slovakia for free. To reach a number without an app, VoIP services are usually cheaper than your operator’s international rate.
Frequently asked questions
What country has the code +421?
Slovakia has the country calling code +421.
How do I call Slovakia from the United States?
Dial 011, then 421, then the local number without its leading 0 — for example 011 912 123 456.
What does +421 mean?
It is the international dialing code for Slovakia. The + stands for your exit code (00 in much of the world, 011 in North America).
Is +421 mobile or landline?
The +421 code identifies the country, not the line type; Slovakia landlines and mobiles share it.
A country code covers a whole nation; the full number depends on the city and operator.
Mobile network codes in Slovakia
Every mobile network is identified by a mobile country code (MCC) and a mobile network code (MNC). They appear on your phone when it roams, in SIM settings and in any network lookup. Slovakia has 4 network operators with their own infrastructure:
| Network | MCC-MNC | Technologies | Subscribers |
|---|---|---|---|
| OrangeOrange S.A. | 231-01, 231-05 | 2G · 4G · 5G | 2.39 MQ4 2024 |
| O2e& PPF Telecom Group | 231-06 | 2G · 4G · 5G | 2.34 MQ4 2024 |
| TelekomDeutsche Telekom AG | 231-02, 231-04 | 2G · 4G · 5G | 2.34 MQ1 2026 |
| 4kaSWAN | 231-03 | 4G · 5G | 0.67 MQ2 2025 |
A struck-through generation has been switched off on that network. MCC-MNC: ITU-T E.212 codes as listed on Wikipedia.
2G and 3G switch-off timeline
- Telekom — 3G (UMTS) switched off
- Orange — 3G (UMTS) switched off
- O2 — 3G (UMTS) switched off
- Orange — 2G (GSM) planned switch-off
Keeping a number when changing network
- Mobile number portability
- since 2004-05-01
- Porting time
- 4 day(s)
- Cost to the customer
- Free
Because numbers can be ported, the prefix of a mobile number only tells you which network first issued it, not the network it uses today.
Received a call from a Slovakia number? Check it with the phone number lookup: type of line, format and local time.
Source: Wikipedia — lists of mobile network operators, mobile network codes, 2G and 3G phase-out, mobile number portability (CC BY-SA 4.0). Subscriber counts as published by each operator or regulator at the date shown.