| Postal Code | 051231 |
| Postal Code Name | Rahova |
| Province | Bucharest Municipality |
| Municipality | Municipiul București |
| Timezone | Eastern European Time (EET) |
| Adjacent Postal Codes | 051224 051232 051234 051235 051236 051237 051242 051243 051244 051245 051246 051247 051252 051254 051262 051265 051272 051274 051281 051282 051283 051285 051522 051523 |