How to call Slovakia using the international calling code +421 and area code.
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Example numbers for Slovakia:
Your local time
—:—
Time in Slovakia
—:—
Code
+421
ISO
SK
Region
Europe
Time zone
Europe/Bratislava
Every Slovakia number in international format follows this shape — colour-coded so you can see where the country code ends and the local number begins.
When dialing Slovakia from abroad, the only fixed part is +421 — that's the country code. The rest depends on whether you're calling a mobile or landline number inside Slovakia.
+XXX XXX XXX XXX
Dial the country code +421, then the full mobile number.
Example: +421 912 123 456
+421
Enter the country code +421 when dialing Slovakia from abroad.
Add the local phone number (in most countries, drop the leading zero).
Use TwinPhone to connect the call at low per-minute rates.
Slovakia's international country code is +421. It was assigned by the International Telecommunication Union under recommendation E.164 and is the dialing prefix at the start of every Slovakia phone number written in international format.
You'll often see +421 referred to in search as the "421 area code". Strictly speaking, +421 is a country code — area codes are sub-national, used inside Slovakia. The practical meaning is the same: any number starting with +421 or 00421 is a Slovakia number.
TwinPhone routes calls to every +421 number directly from your browser — no app, no SIM card, no calling card. Type +421 followed by the local number, press call, and you're connected.
Dialing codes immediately above and below +421 in the ITU plan — handy if you mistyped a digit or are dialing across a region.
Landline
$0.02
per minute
Mobile
$0.17
per minute
Include the area code if applicable. Omit any leading 0.
Everything you need to know about TwinPhone.
The country code (international dialing code) for Slovakia is +421. To call Slovakia from abroad, dial +421 followed by the national number (in most countries, without its leading zero).
+421 is Slovakia's international country calling code under the ITU E.164 plan — often searched as the "421 area code". Any phone number starting with +421 is a Slovakia number.
From TwinPhone, just type +421 and the number — we connect it. From a landline, dial your exit code, then +421, then the number (in most countries, without the leading 0).
Slovakia's current local time is shown live on this page. Check it before calling so you reach people during waking hours.
No. TwinPhone works directly in your browser — Chrome, Edge, Safari, or Brave. Open the site, add credit, dial +421 and your number, done. No installs, no plugins, no SIM card required.
Yes! Virtual numbers in Slovakia start at $1.60/month. Use it as your caller ID so people see a local number, or receive incoming calls directly in your browser.
Every call uses industry-standard transport encryption (TLS + SRTP). We don't sell your data or share your call history. We do not record calls.
TwinPhone uses adaptive audio technology that adjusts to your connection quality. Even on slow or unstable Wi-Fi — airport, hotel, coffee shop — your call stays connected and audible.
Calls to Slovakia landlines start at just $0.02/min and mobile at $0.17/min. No connection fees, no hidden charges. Billed per minute in 60-second increments (rounded up to the next minute).
Dial Slovakia from your browser — pay only for what you call.
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