UK Area Code Finder
Quick and easy telephone dialling code information
Slovakia uses the country code +421.
From the United Kingdom you need to dial:
then the full national number minus any leading 0
Dialled from the UK as: 00 421 39 2345678
Sometimes, the number you want to call may already be written out including the +421 country code. For example:
In such cases, you just replace the '+' with the UK international access code of 00 and ignore any reference to '(0)'. Both the examples above would be dialled as: 00 421 39 2345678.
To call a United Kingdom landline or mobile phone from Slovakia, dial 00 44, then the UK number without its leading zero.
For example, the UK number