As a box code, 0042 is used for 21 post office box locations.
PO Boxes using 0042
| Suburb | Town | Province |
|---|---|---|
| Pretoriuspark | Garsfontein | Gauteng |
| The Wilds | Garsfontein | Gauteng |
| Garsfontein | Menlo Park | Gauteng |
| Garsfontein Ext 1 | Menlo Park | Gauteng |
| Garsfontein Ext 10 | Menlo Park | Gauteng |
| Garsfontein Ext 11 | Menlo Park | Gauteng |
| Garsfontein Ext 12 | Menlo Park | Gauteng |
| Garsfontein Ext 13 | Menlo Park | Gauteng |
| Garsfontein Ext 14 | Menlo Park | Gauteng |
| Garsfontein Ext 15 | Menlo Park | Gauteng |
| Garsfontein Ext 16 | Menlo Park | Gauteng |
| Garsfontein Ext 17 | Menlo Park | Gauteng |
| Garsfontein Ext 2 | Menlo Park | Gauteng |
| Garsfontein Ext 3 | Menlo Park | Gauteng |
| Garsfontein Ext 4 | Menlo Park | Gauteng |
| Garsfontein Ext 5 | Menlo Park | Gauteng |
| Garsfontein Ext 6 | Menlo Park | Gauteng |
| Garsfontein Ext 7 | Menlo Park | Gauteng |
| Garsfontein Ext 8 | Menlo Park | Gauteng |
| Garsfontein Ext 9 | Menlo Park | Gauteng |
| Garsfontein West | Menlo Park | Gauteng |