Country codes › Europe
🇸🇰 +421 country code
+421 is the international dialing code for Slovakia. A number there is written +421 901 123 456 internationally and 0901 123 456 at home. Enter a +421 number below for a free check before you call back.
- Country code: +421
- Exit code from Slovakia: 00
- Time: UTC+1
- Mobile numbers: 9 digits
Consultar un número
Validez, operador, tipo de línea y región en la primera pasada.
+421 at a glance
- Country code
- +421
- Country
- 🇸🇰 Slovakia
- Region
- Europe
- Exit code (to call out)
- 00
- Trunk prefix (domestic)
- 0
- International format
- +421 901 123 456
- Domestic format
- 0901 123 456
- From the US / Canada
- 011 421 901 123 456
- Mobile number length
- 9 digits
- Landline length
- 6, 7 or 9 digits
- Time zone
- UTC+1, with daylight saving
- Local time now
- —
Area codes inside +421
Landline numbers in Slovakia begin with a local area code after +421. The main ones:
- +421 2
- +421 58
- +421 48
- +421 54
- +421 31
- +421 57
- +421 55
- +421 36
- +421 44
- +421 47
- +421 43
- +421 56
Unexpected call from +421?
If you have no contacts in Slovakia, a missed call from +421 that rings once is the classic "wangiri" pattern: the callback is billed at international or premium rates. Do not call back; look the number up instead.
Messages from foreign numbers offering jobs, investments or "a wrong number" chat are another common opener. A real +421 number can also be spoofed, so caller ID alone proves little — check whether the number is valid, which network holds it and whether it is a mobile, landline or VoIP line.
Foreign number on your screen? Why caller ID isn't the whole story
How to dial +421
- From a mobile anywhere: press + (hold 0), then 421, then the number without the leading 0.
- From the US or Canada: dial 011, then 421, then the number without the leading 0 — for example 011 421 901 123 456.
- From most of Europe, Africa and Asia: dial 00, then 421 and the number without the leading 0.
- Inside Slovakia: drop the 421 and dial the number with its 0 in front — 0901 123 456.
Mobile networks on +421
Mobile number ranges under +421 are allocated to these networks, among others. Numbers can be ported between them, which is why a lookup checks the live carrier rather than the range.
- T-Mobile (Slovak Telekom)
- Orange
- Telefonica O2
- 4ka of SWAN
- Alternet, s.r.o.
- BSG Estonia
- IPfon, s.r.o.
- Slovak Republic Railways (GSM-R)
Preguntas frecuentes
+421 questions
Sources: Google libphonenumber. Area codes show where a number was assigned, not where its owner is today.
Which country uses +421?
+421 is the country code for Slovakia.
How do I call a +421 number from the US?
Dial 011, then 421, then the number without its leading 0. For example: 011 421 901 123 456.
How many digits is a Slovakia phone number?
Mobile numbers have 9 digits after +421; landlines have 6, 7 or 9. A number with a different length is either mistyped or not genuine.
Which mobile networks use +421?
Number ranges under +421 are allocated to networks including T-Mobile (Slovak Telekom), Orange, Telefonica O2, 4ka of SWAN and Alternet, s.r.o. Numbers can be ported, so a lookup checks the current carrier rather than the original range.
Who is calling me from +421?
Enter the number in the lookup at the top of this page. The free check confirms whether it is valid and shows its carrier, line type and region; a full report adds owner and public-web records where they exist.
Got a call from +421?
Run the free check first — validity, carrier, line type and region — and unlock the full report only if you need it.