| Postcode | City | X | Y | |
| | 7730 | Bailleul | 50.6698 | 3.31868 |
| | 7730 | Estaimbourg | 50.6803 | 3.30985 |
| | 7730 | Estaimpuis | 50.6756 | 3.27582 |
| | 7730 | Evregnies | 50.7129 | 3.28657 |
| | 7730 | Leers nord | 50.6877 | 3.27184 |
| | 7730 | Néchin | 50.7068 | 3.31835 |
| | 7730 | Saint léger | 50.7068 | 3.31835 |