| Postal Code | 75-342 |
| Postal Code Name | Koszalin |
| Voivodeship | West Pomeranian Voivodeship |
| County | Koszalin |
| Timezone | Central European Time (CET) |
| Adjacent Postal Codes | 75-016 75-256 75-257 75-303 75-332 75-333 75-334 75-339 75-341 75-343 75-344 75-346 75-347 75-348 75-356 75-360 75-361 75-362 75-364 75-412 75-430 75-446 75-452 75-900 |