21640 is the Postal Code/PLZ Code for Horneburg in the Germany State of Lower Saxony and the District of Landkreis Stade. The town of Horneburg is located in Postal Code 21640.
| Postal Code | 21640 |
| Postal Code Name | Horneburg |
| State | Lower Saxony |
| District | Landkreis Stade |
| Timezone | Central European Summer Time (CEST) |
| Adjacent Postal Codes | 21614 21635 21641 21698 21717 21720 21739 |