As a box code, 0021 is used for 2 post office box locations.
PO Boxes using 0021
| Suburb | Town | Province |
|---|---|---|
| Eersterus | Silverton | Gauteng |
| Eersterus Ext 2 | Silverton | Gauteng |
Postal code 0021
Silverton, Gauteng
0021 is a PO Box code in Gauteng, South Africa, mainly serving Silverton.