| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Biwer, Biwer | 6833, 6834 |
| Postal/ZIP Codes in Biwerbach, Biwer | 6834 |
| Postal/ZIP Codes in Boudler, Biwer | 6835 |
| Postal/ZIP Codes in Boudlerbach, Biwer | 6835 |
| Postal/ZIP Codes in Breinert, Biwer | 6836 |
| Postal/ZIP Codes in Brouch, Biwer | 6837 |
| Postal/ZIP Codes in Hagelsdorf, Biwer | 6838 |
| Postal/ZIP Codes in Wecker, Biwer | 6868, 6869, 6870, 6871 |
| Postal/ZIP Codes in Wecker-Gare, Biwer | 6852, 6868 |
| Postal/ZIP Codes in Weydig, Biwer | 6880 |