The Area Codes of Netherlands:
| City/Town or Region | Area code | |
|---|---|---|
| 1. | Haarlem | 023 (+3123) |
| 2. | Harderwijk | 0341 (+31341) |
| 3. | Harenkarspel | 0226 (+31226) |
| 4. | Heerenveen | 0513 (+31513) |
| 5. | Heerlen | 045 (+3145) |
| 6. | Helmond | 0492 (+31492) |
| 7. | Hengelo | 074 (+3174) |
| 8. | Hertogenbosch | 073 (+3173) |
| 9. | Hillegom | 0252 (+31252) |
| 10. | Hilversum | 035 (+3135) |
| 11. | Hoogeveen | 0528 (+31528) |
| 12. | Hoogezand | 0598 (+31598) |
| 13. | Hoorn | 0229 (+31229) |
| 14. | Hulst | 0114 (+31114) |