21720 is the Postal Code/PLZ Code for Grünendeich in the Germany State of Lower Saxony and the District of Landkreis Stade.
| Postal Code | 21720 |
| Postal Code Name | Grünendeich |
| State | Lower Saxony |
| District | Landkreis Stade |
| Timezone | Central European Summer Time (CEST) |
| Adjacent Postal Codes | 21635 21640 21684 21723 21739 |