| Postal Code | 01-355 |
| Postal Code Name | Warsaw |
| Voivodeship | Masovian Voivodeship |
| County | Warsaw |
| Timezone | Central European Summer Time (CEST) |
| Adjacent Postal Codes | 01-315 01-318 01-356 01-357 01-360 01-361 01-373 01-381 01-459 01-460 01-461 01-465 01-466 01-470 01-471 01-485 01-493 01-494 01-496 01-497 01-840 01-842 01-922 01-934 |