99991 is the Postal Code/PLZ Code for Unstrut-Hainich in the Germany State of Thuringia and the District of Landkreis Unstrut-Hainich-Kreis.
| Postal Code | 99991 |
| Postal Code Name | Unstrut-Hainich |
| State | Thuringia |
| District | Landkreis Unstrut-Hainich-Kreis |
| Timezone | Central European Summer Time (CEST) |
| Adjacent Postal Codes | 99947 99986 99998 |