| Country | France (FR) |
| UN/LOCODE | GUC |
| Name | Guyancourt |
| Name Without Diacritics | Guyancourt |
| Region | 78 |
| Function Code | --3----- |
| Function | Road |
| Status Code | RL (Recognised Location) |
| Date | 201 |
| Timezone | Europe/Paris |
| Location (UN Format) | 4846N 00204E |
| Latitude Longitude | 48.7733, 2.0739 |