As a box code, 2040 is used for 12 post office box locations.
PO Boxes using 2040
| Suburb | Town | Province |
|---|---|---|
| Honey Park Ext 10 | Honeydew | Gauteng |
| Honey Park Ext 21 | Honeydew | Gauteng |
| Eagles Landing | Johannesburg | Gauteng |
| Honeydew | Johannesburg | Gauteng |
| Honeydew Ext 7 | Johannesburg | Gauteng |
| Honeydew Ext 8 | Johannesburg | Gauteng |
| Mostyn Park | Johannesburg | Gauteng |
| Panorama | Johannesburg | Gauteng |
| Tres Jolie | Johannesburg | Gauteng |
| Honeydew Manor Ext 8 | Randburg | Gauteng |
| Honeydew Ridge Ext 13 | Randburg | Gauteng |
| Honeydew Grove Ext 8 | Roodepoort | Gauteng |