Country code
Slovakia: +421
Slovakia uses country code +421. From the United States, dial 011 421 912 123 456. A number is written +421 912 123 456.
How to call Slovakia
The table uses the example number below. Replace it with the number you are calling. Drop the 0 at the start of the national number when you dial from abroad.
| Calling from | Exit code | Dial |
|---|---|---|
| Any mobile phone | None | +421 912 123 456 |
| United States | 011 | 011 421 912 123 456 |
| Canada | 011 | 011 421 912 123 456 |
| United Kingdom | 00 | 00 421 912 123 456 |
| Australia | 0011 | 0011 421 912 123 456 |
| Germany | 00 | 00 421 912 123 456 |
| France | 00 | 00 421 912 123 456 |
| India | 00 | 00 421 912 123 456 |
| Japan | 010 | 010 421 912 123 456 |
| Mexico | 00 | 00 421 912 123 456 |
| South Africa | 00 | 00 421 912 123 456 |
How a Slovakia number is built
Digit counts are the national number only, after the country code and without the 0 trunk prefix.
| Line | Digits | Pattern |
|---|---|---|
| Mobile | 9 digits | 909[1-9]\d{5}|9(?:0[1-8]|1[0-24-9]|4[03-57-9]|5\d)\d{6} |
| Landline | 6, 7 or 9 digits | A pattern of 109 characters, applied by the validator below |
| Toll free | 9 digits | 800\d{6} |
| Premium rate | 9 digits | 9(?:00|[78]\d)\d{6} |
- Example, national form
- 0912 123 456
- Example, international form
- +421 912 123 456
Validate a Slovakia number
Paste a number and the tool checks it against the numbering plan. It returns the standard formats and the line type the plan assigns.
Type the number the way it is written in Slovakia, or start with + and the country code.
Area codes and places in Slovakia
The start of a number shows the place its range was first assigned to. 26 ranges are listed in the source.
| Starts with | Place |
|---|---|
| +421 2 | Bratislava |
| +421 31 | Dunajska Streda |
| +421 32 | Trencin |
| +421 33 | Trnava |
| +421 34 | Senica |
| +421 35 | Nove Zamky |
| +421 36 | Levice |
| +421 37 | Nitra |
| +421 38 | Topolcany |
| +421 41 | Zilina |
| +421 42 | Povazska Bystrica |
| +421 43 | Martin |
Show the other 14 rows
| Starts with | Place |
|---|---|
| +421 44 | Liptovsky Mikulas |
| +421 45 | Zvolen |
| +421 46 | Prievidza |
| +421 47 | Lucenec |
| +421 48 | Banska Bystrica |
| +421 51 | Presov |
| +421 52 | Poprad |
| +421 53 | Spisska Nova Ves |
| +421 54 | Bardejov |
| +421 55 | Kosice |
| +421 56 | Michalovce |
| +421 57 | Humenne |
| +421 58 | Roznava |
| +421 601 | Roznava |
26 rows. Names are where the range was first assigned; numbers move between places and carriers.
Who first issued each range in Slovakia
39 ranges are listed in the source with the network that first held them. Numbers port between networks, so the current network can differ.
| Starts with | First issued to |
|---|---|
| +421 901 | T-Mobile (Slovak Telekom) |
| +421 902 | T-Mobile (Slovak Telekom) |
| +421 903 | T-Mobile (Slovak Telekom) |
| +421 904 | T-Mobile (Slovak Telekom) |
| +421 905 | Orange |
| +421 906 | Orange |
| +421 907 | Orange |
| +421 908 | Orange |
| +421 9091 | T-Mobile (Slovak Telekom) |
| +421 9092 | T-Mobile (Slovak Telekom) |
| +421 9093 | T-Mobile (Slovak Telekom) |
| +421 9094 | T-Mobile (Slovak Telekom) |
Show the other 27 rows
| Starts with | First issued to |
|---|---|
| +421 9095 | T-Mobile (Slovak Telekom) |
| +421 9096 | T-Mobile (Slovak Telekom) |
| +421 9097 | T-Mobile (Slovak Telekom) |
| +421 9098 | T-Mobile (Slovak Telekom) |
| +421 9099 | T-Mobile (Slovak Telekom) |
| +421 910 | T-Mobile (Slovak Telekom) |
| +421 911 | T-Mobile (Slovak Telekom) |
| +421 912 | T-Mobile (Slovak Telekom) |
| +421 914 | T-Mobile (Slovak Telekom) |
| +421 915 | Orange |
| +421 916 | Orange |
| +421 917 | Orange |
| +421 918 | Orange |
| +421 919 | Orange |
| +421 940 | Telefonica O2 |
| +421 9430 | BSG Estonia |
| +421 94312 | Alternet, s.r.o. |
| +421 94333 | IPfon, s.r.o. |
| +421 944 | Telefonica O2 |
| +421 945 | Orange |
| +421 947 | Telefonica O2 |
| +421 948 | Telefonica O2 |
| +421 949 | Telefonica O2 |
| +421 950 | 4ka of SWAN |
| +421 951 | 4ka of SWAN |
| +421 952 | 4ka of SWAN |
| +421 9598 | Slovak Republic Railways (GSM-R) |
39 rows. The first issuer of the range; numbers port between carriers, so the current carrier can differ.
Questions about calling Slovakia
- What is the country code for Slovakia?
- The country code for Slovakia is +421. Written in full, a number looks like +421 912 123 456.
- How do I call Slovakia from the United States?
- Dial 011, then 421 912 123 456. On a mobile phone you can dial +421 912 123 456 instead.
- Do I dial the 0 at the start of a Slovakia number from abroad?
- No. The 0 is the trunk prefix used for calls inside Slovakia (0912 123 456). From abroad it is dropped after +421 (+421 912 123 456).
- How many digits is a Slovakia phone number?
- Mobile numbers have 9 digits after the country code. Landline numbers have 6, 7 or 9 digits.
- How do I call another country from Slovakia?
- Dial 00, then the country code and the number. On a mobile phone, + replaces 00.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Country Calling Codes | 1 credit per lookup (an unknown code, country or name is free) | API docs |
Number patterns, lengths and examples: libphonenumber-js 1.13.15, released 2026-10-08, read 2026-10-19, built on Google's libphonenumber metadata. Place names and first issuers: libphonenumber geocoding and carrier files, read 2026-10-19. Library. LookValid is not connected to Google or to any phone company named here.