The Slovakia country code is +421 — reaching the heart of central Europe, ~5.4 million Slovaks + ~7 million mobile subscriptions across Orange Slovensko, Slovak Telekom, O2 Slovakia + 4ka. The world's largest per-capita car producer — Slovak bank verifications all expect +421.
Slovakia was assigned +421 by the ITU after the 1993 split of Czechoslovakia — placing it in zone 4 with central Europe, next-door to the Czech Republic +420.
Slovakia has used the +421 country code since 1997, when the ITU placed it in zone 4 alongside the Czech Republic +420, Austria +43, Hungary +36, Poland +48, Germany +49 + Switzerland +41. The "+42X" block was split from former Czechoslovakia +42 — Czechia took +420, Slovakia +421.
Slovakia's telecom industry is regulated by RÚ (Regulačný úrad pre elektronické komunikácie a poštové služby — Regulatory Authority for Electronic Communications and Postal Services). Four mobile carriers: Orange Slovensko (largest), Slovak Telekom (Telekom — Deutsche Telekom/Magenta), O2 Slovakia + 4ka (SWAN). 5G live across Slovakia.
Slovak predvoľby (area codes) are variable length. Bratislava uses just <b>02</b> (1 digit after 0) — the shortest in Slovakia. Other major: 055 Košice, 051 Prešov, 041 Žilina, 037 Nitra, 048 Banská Bystrica. Slovak mobiles all start with <b>09</b> (0901-0908, 0910-0919, 0940-0950).
Slovakia builds more cars per person than any other country on Earth. Volkswagen (Bratislava), Kia (Žilina), Stellantis/PSA (Trnava) + Jaguar Land Rover (Nitra) all run giant plants here.
Slovakia is also home to ESET (the global antivirus + cybersecurity firm, HQ Bratislava), Pixel Federation (games) + Sygic (maps) — a quiet but mighty tech corner of the EU.
A Slovak phone number in international format is written as +421 [predvoľba without 0] [local]. Example: +421 2 1234 5678 for Bratislava (02-1234 5678 domestic), +421 55 123 4567 for Košice, +421 901 123 456 for an Orange mobile.
Slovak mobile numbers all start with 09 (0901-0950 domestically; +421 9XX internationally). Drop the leading 0 internationally. Slovak numbers are 9 digits after the trunk 0 — Bratislava 02-numbers + mobiles are consistently formatted.
From the Bratislava Castle on the Danube to the High Tatras above Poprad, every Slovak number lives behind a +421. Pick the predvoľba that matches your customer city.
Every country uses a different exit code before +421. From any mobile, + replaces the exit code — so +421 2 1234 5678 works worldwide. Always drop the leading 0 from Slovak numbers.
011011 421 N NNN NNN+421 9NN NNN NNN011011 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN00110011 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN010010 421 N NNN NNN+421 9NN NNN NNN001001 421 N NNN NNN+421 9NN NNN NNN001001 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNN8 108 10 421 N NNN NNN+421 9NN NNN NNN00 2100 21 421 N NNN NNN+421 9NN NNN NNN0000 421 N NNN NNN+421 9NN NNN NNNTip: Slovak mobiles all start with 09 (after dropping 0, they become 9XX). Bratislava uses the shortest predvoľba in Slovakia: just "2" after the leading 0. Slovak numbers are 9 digits after the trunk 0 — Bratislava 02 + mobiles formatted consistently.
+421 reaches Europe's automotive-manufacturing capital + the home of ESET, Volkswagen Bratislava, Kia Žilina + Jaguar Land Rover Nitra. Every Slovak bank verifies with +421.
Every Slovak bank — Slovenská sporiteľňa, Tatra banka, VÚB (Všeobecná úverová banka), ČSOB, 365.bank + Poštová banka — sends mobile OTPs to +421 numbers. Open accounts, confirm SEPA transfers + pass KYC with a Slovak mobile.
Slovakia builds more cars per capita than anywhere on Earth — Volkswagen (Bratislava), Kia (Žilina), Stellantis/PSA (Trnava) + Jaguar Land Rover (Nitra). A +421 line connects you to this dense automotive + supplier ecosystem across the country.
A +421 line connects you to Slovak tech — ESET (global antivirus + cybersecurity, HQ Bratislava), Pixel Federation (games), Sygic (offline maps) + a fast-growing Bratislava + Košice startup scene. Bratislava 02 is the country's tech + finance heart.
Slovakia joined the eurozone on 1 January 2009 — the only Visegrád country on the euro for years. A +421 number is essential for any business selling into Slovakia's euro-denominated, EU-single-market economy.
Slovakia runs on CET (UTC+1) winter, CEST (UTC+2) summer — same clock as Czechia, Austria, Germany, Hungary, Poland. Pan-EU + central-European business hours align cleanly.
CallMama routes +421 numbers through RÚ-licensed Slovak carriers under EU GDPR + Slovakia's Zákon o elektronických komunikáciách. Voice + SMS data stays within EU/EEA.
Pick your predvoľba — 02 Bratislava, 055 Košice, 051 Prešov, 041 Žilina — and start calling, texting + receiving Slovenská sporiteľňa, Tatra banka + VÚB OTPs from real Slovak customers.
Same six features come standard on every CallMama Slovakia number — no upsell tiers, no per-feature charges.
Route any incoming call to your real mobile, a teammate, or voicemail — by schedule, caller, or custom rule.
One-tap recording for client calls and consults. Files store securely in your dashboard for replay or download.
Decide which local number shows on outbound calls so contacts always see a familiar prefix.
Voicemails arrive as audio plus a written transcript in your inbox — read or listen, no missed message.
Send and receive text and image messages from your number — same line works on web, iOS, and Android.
Outbound calls to 200+ countries from the same app. Skip carrier roaming and international add-ons.
From "I want a Slovakia number" to making your first call — three taps and you're live.
Choose the area code or city prefix that matches where you sell.
Six-digit confirmation drops into the app. No documents to upload, no waiting room, no callbacks.
Your Slovakia line is live. Start dialing, texting, and being reached — exactly the way a local would.
Name, country code, ISO 3166 alpha-2 & alpha-3, exit code, and ITU zone. Filter by continent or search by name or code.
| Country | Code | ISO-2 | ISO-3 | Exit | Zone |
|---|---|---|---|---|---|
| Afghanistan | +93 | AF | AFG | 00 | 9 |
| Albania | +355 | AL | ALB | 00 | 3 |
| Algeria | +213 | DZ | DZA | 00 | 2 |
| American Samoa | +1 | AS | ASM | 011 | 1 |
| Andorra | +376 | AD | AND | 00 | 3 |
| Angola | +244 | AO | AGO | 00 | 2 |
| Anguilla | +1 | AI | AIA | 011 | 1 |
| Antarctica | +672 | AQ | ATA | 00 | 6 |
| Antigua and Barbuda | +1 | AG | ATG | 011 | 1 |
| Argentina | +54 | AR | ARG | 00 | 5 |
| Armenia | +374 | AM | ARM | 00 | 3 |
| Aruba | +297 | AW | ABW | 00 | 2 |
| Australia | +61 | AU | AUS | 0011 | 6 |
| Austria | +43 | AT | AUT | 00 | 4 |
| Azerbaijan | +994 | AZ | AZE | 00 | 9 |
| Bahamas | +1 | BS | BHS | 011 | 1 |
| Bahrain | +973 | BH | BHR | 00 | 9 |
| Bangladesh | +880 | BD | BGD | 00 | 8 |
| Barbados | +1 | BB | BRB | 011 | 1 |
| Belarus | +375 | BY | BLR | 810 | 3 |
011 421 2 1234 5678 for Bratislava, or 011 421 901 123 456 for a Slovak mobile. On any mobile, replace 011 with +.00 421 55 123 4567 for Košice. Or use +421 2 1234 5678 from any UK mobile.00 421 2 1234 5678 for Bratislava. Germany hosts a large Slovak diaspora + many automotive supply links, so Germany-Slovakia is a heavy telecom route.00 421 41 123 4567 for Žilina. Czechia +420 + Slovakia +421 were one country until 1993, so this is the busiest cross-border route in the region.+421 [predvoľba without 0] [local]. Example: +421 2 1234 5678 for Bratislava, +421 55 123 4567 for Košice, +421 901 123 456 for a Slovak mobile.One tap to install. One more to call. It really is that simple.