| Postal Code | 04-501 |
| Postal Code Name | Warsaw |
| Voivodeship | Masovian Voivodeship |
| County | Warsaw |
| Timezone | Central European Summer Time (CEST) |
| Adjacent Postal Codes | 04-186 04-191 04-192 04-193 04-194 04-202 04-203 04-204 04-211 04-217 04-218 04-228 04-502 04-504 04-505 04-506 04-508 04-509 04-510 04-555 04-556 04-601 04-647 04-663 04-667 04-668 04-669 |