The Area Codes of Czech Republic:
The 10 most frequently searched cities / regions or area codes:
| City/Town or Region | Area code | |
|---|---|---|
| 1. | Central Bohemian | 31 (+420 31) |
| 2. | Central Bohemian | 32 (+420 32) |
| 3. | Hradec Králové | 49 (+420 49) |
| 4. | Karlovy Vary | 35 (+420 35) |
| 5. | Liberec | 48 (+420 48) |
| 6. | Moravian-Silesian | 55 (+420 55) |
| 7. | Moravian-Silesian | 59 (+420 59) |
| 8. | Olomouc | 58 (+420 58) |
| 9. | Pardubice | 46 (+420 46) |
| 10. | Plzeň | 37 (+420 37) |