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Postcode 3900-3999 |
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Postcode 3900-3999 |
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| Postcode | Order | City |
| 3900 | 01 | Overpelt |
| 3910 | 01 | Neerpelt |
| 3910 | 02 | Sint-Huibrechts-Lille |
| 3920 | 01 | Lommel |
| 3930 | 01 | Achel |
| 3930 | 02 | Hamont |
| 3941 | 01 | Eksel |
| 3945 | 02 | Kwaadmechelen |
| 3950 | 01 | Bocholt |
| 3960 | 02 | Bree |
| 3960 | 03 | Gerdingen |
| 3960 | 04 | Opitter |
| 3960 | 05 | Tongerlo (Limburg) |
| 3970 | 01 | Leopoldsburg |
| 3980 | 01 | Tessenderlo |
| 3990 | 03 | Peer |