To call the Czech Republic from the United Kingdom, India, Ireland, New Zealand, Pakistan, South Africa, to the Czech Republic, use 00420 or +420 and then the phone number. Your call will be charged according to your tariff.
To call from Canada, Australia, the United States to the Czech Republic, use 011420 and then the phone number. Your call will be charged according to your tariff.
To call the United Kingdom from the Czech Republic, use the national dialling code, 0044 or +44, and then the area code, without the initial 0, followed by the phone number.
To call Ireland from the Czech Republic, use the national dialling code 00353 or +353, and then the area phone number, without the initial 0.
If you want to call the US or Canada from the Czech Republic, dial 001 or +1 and then the relevant numbers. You will be charged according to your tariff.
Calls to India: 0091, to South Africa: 0027 or +27.