| City | City Code |
|---|---|
| Amsterdam | 20 |
| Arnhem | 26 |
| de Meem | 30 |
| Den Bosch | 73 |
| Deventer | 570 |
| Eindhoven | 40 |
| Groningen | 50 |
| Haarlem | 23 |
| Heemstede | 23 |
| Hillegersberg | 10 |
| Hilversum | 35 |
| Hoensbroek | 45 |
| Hoogkerk | 50 |
| Hoogvliet | 10 |
| Ijsselstein | 30 |
| Leinden | 71 |
| Loosduinen | 70 |
| Nieuwegein | 30 |
| Nijmegen | 24 |
| Oud Zuilen | 30 |
| Rotterdam | 10 |
| The Hague | 70 |
| Utrecht | 30 |
| Vught | 73 |
| Zeist | 30 |
| Mobile Phones | 61,62,64,65 630,636,633,636,638 |
