The Area Codes of Netherlands:
| City/Town or Region | Area code | |
|---|---|---|
| 1. | Oldenzaal | 0541 (+31541) |
| 2. | Ommen | 0529 (+31529) |
| 3. | Oosterhout | 0162 (+31162) |
| 4. | Ooststellingwerf | 0516 (+31516) |
| 5. | Oss | 0412 (+31412) |
| 6. | Oud-Beijerland | 0186 (+31186) |
The Area Codes of Netherlands:
| City/Town or Region | Area code | |
|---|---|---|
| 1. | Oldenzaal | 0541 (+31541) |
| 2. | Ommen | 0529 (+31529) |
| 3. | Oosterhout | 0162 (+31162) |
| 4. | Ooststellingwerf | 0516 (+31516) |
| 5. | Oss | 0412 (+31412) |
| 6. | Oud-Beijerland | 0186 (+31186) |