| Postal Code | 75-400 |
| Postal Code Name | Koszalin |
| Voivodeship | West Pomeranian Voivodeship |
| County | Koszalin |
| Timezone | Central European Summer Time (CEST) |
| Adjacent Postal Codes | 75-001 75-002 75-003 75-004 75-005 75-011 75-052 75-054 75-240 75-302 75-401 75-402 75-403 75-404 75-405 75-409 75-411 75-415 75-420 75-423 75-600 75-622 |