How to Call the Czech Republic From the United States. The phone network in the Czech Republic is fairly well developed compared to those of other eastern European countries, so if you're planning a trip to Prague, you shouldn't have too many problems getting through.
Determine what time it is in the Czech Republic. It's 1 hour ahead of Greenwich Mean Time, which means it is 6 hours later in the Czech Republic than it is on the East Coast of the United States, and 9 hours later than it is on the West Coast.
Dial 011, the international access code.
Dial 420, the Czech Republic's country code.
Remove the 0 from the beginning of the city code. Some codes for major cities in the Czech Republic include 02 for Prague, 05 for Brno and 038 for Ceske Budejovice.
Dial the remaining digits.
