As a box code, 1540 is used for 12 post office box locations.
PO Boxes using 1540
| Suburb | Town | Province |
|---|---|---|
| Brakpan | Benoni | Gauteng |
| Anzac Ext 1 | Brakpan | Gauteng |
| Anzac Ext 2 | Brakpan | Gauteng |
| Apex Industrial | Brakpan | Gauteng |
| Brakpan North Ext 3 | Brakpan | Gauteng |
| Denneoord | Brakpan | Gauteng |
| Kenleaf Ext 11 | Brakpan | Gauteng |
| Kenleaf Ext 8 | Brakpan | Gauteng |
| Larrendale Ext 2 | Brakpan | Gauteng |
| Sonneveld | Brakpan | Gauteng |
| Sonneveld Ext 7 | Brakpan | Gauteng |
| Witpoort | Brakpan | Gauteng |