| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Assen, Assen | 9401, 9402, 9403, 9404, 9405, … |
| Postal/ZIP Codes in Loon, Assen | 9409 |
| Postal/ZIP Codes in Rhee, Assen | 9486 |
| Postal/ZIP Codes in Ter Aard, Assen | 9487 TB, 9487 TA |
| Postal/ZIP Codes in Ubbena, Assen | 9492 |
| Postal/ZIP Codes in Zeijerveen, Assen | 9489 |
| Postal/ZIP Codes in Zeijerveld, Assen | 9488 |