As a box code, 1689 is used for 13 post office box locations.
PO Boxes using 1689
| Suburb | Town | Province |
|---|---|---|
| Garatse | Ivory Park | Gauteng |
| Goniwe | Tembisa | Gauteng |
| Isivana Section | Tembisa | Gauteng |
| Ivory Park | Tembisa | Gauteng |
| Ivory Park Ext | Tembisa | Gauteng |
| Ivory Park Ext 10 | Tembisa | Gauteng |
| Ivory Park Ext 13 | Tembisa | Gauteng |
| Ivory Park Ext 2 | Tembisa | Gauteng |
| Ivory Park Ext 3 | Tembisa | Gauteng |
| Ivory Park Ext 5 | Tembisa | Gauteng |
| Lindekuhle | Tembisa | Gauteng |
| Tamboville | Tembisa | Gauteng |
| Temong Section | Tembisa | Gauteng |