| Place | Postal Code |
|---|---|
| Postal/ZIP Codes in Yeni mah., Düzce) | 81752 |
| Postal/ZIP Codes in Yeniköy köyü, Düzce) | 81752 |
| Postal/ZIP Codes in Yenivakıf köyü, Düzce) | 81752 |
| Postal/ZIP Codes in Yukarıkaraköy köyü, Düzce) | 81752 |
| Postal/ZIP Codes in Yukarıköy mah., Düzce) | 81752 |
| Postal Codes in Çilimli | |
|---|---|
| Postal/ZIP Codes in Çilimli | |
| Postal/ZIP Codes in Merkezköyler | |