Slovakia Phone Number Format

Country code +421 — Complete guide to Slovakia phone number formats, mobile and landline structures, and area codes.

Number Format Overview

Phone numbers in Slovakia use the international country code +421. When dialing from outside Slovakia, you must include this country code before the local number.

International Format

+421 [area code] [local number]

From the United States

011 421 [area code] [local number]

When dialing a number within Slovakia, local dialing rules apply. You may need to include a trunk prefix (often 0) before the area code for domestic calls, but you should omit this prefix when dialing internationally.

Mobile vs. Landline Numbers

Mobile Numbers

Mobile phone numbers in Slovakia typically:

Begin with specific mobile prefixes
May have a different length than landline numbers
Are often 8-10 digits after the country code

+421 XX XXXX XXXX

Landline Numbers

Landline numbers in Slovakia typically:

Start with a geographic area code
Area codes identify the city or region
Total length varies by area code

+421 (area) XXXX XXXX

Example Phone Numbers

These are example formats only and are not real phone numbers:

Type	Local Format	International Format	From US
Landline (Bratislava)	`(0XX) XXXX XXXX`	`+421 XX XXXX XXXX`	`011 421 XX XXXX XXXX`
Mobile	`0XXX XXX XXXX`	`+421 XXX XXX XXXX`	`011 421 XXX XXX XXXX`
Toll-Free	`0800 XXX XXXX`	`+421 800 XXX XXXX`	`011 421 800 XXX XXXX`

Dialing Tips

Remove the leading zero: When dialing internationally, drop the trunk prefix (usually 0) that is used for domestic calls in Slovakia.
Use the + notation: From a US mobile phone, use +421 instead of 011 421.
Verify the number length: Make sure you have the correct number of digits. If your call does not connect, check whether you need to add or remove an area code digit.
Save contacts in international format: Always store phone numbers with the full +421 prefix so they work from any country.

Slovakia Quick Info

Country Code	+421
ISO Code	SK
Capital	Bratislava
International Prefix	011 (from US)

Full Country Profile

Nearby Countries