| Postal Code | 503 51 |
| Postal Code Name | Chlumec nad Cidlinou |
| Region | Královéhradecký Region |
| District | Hradec Králové District |
| Timezone | Central European Summer Time (CEST) |
| Adjacent Postal Codes | 281 26 281 29 289 03 289 08 503 15 503 23 503 24 503 25 503 56 503 61 503 62 503 63 503 64 503 65 503 66 504 01 533 16 533 41 535 01 |