As a box code, 1865 is used for 15 post office box locations.
PO Boxes using 1865
| Suburb | Town | Province |
|---|---|---|
| Braamfischer Ext 1 | Dobsonville | Gauteng |
| Braamfischer Phase 1 | Dobsonville | Gauteng |
| Braamfischer Phase 2 | Dobsonville | Gauteng |
| Braamfischer Phase 4 | Dobsonville | Gauteng |
| Braamfischerville Ext 5 | Dobsonville | Gauteng |
| Dobsonville Block 10 | Dobsonville | Gauteng |
| Dobsonville Block 6 | Dobsonville | Gauteng |
| Dobsonville Gardens | Dobsonville | Gauteng |
| Greenvillage | Dobsonville | Gauteng |
| Silvertown | Dobsonville | Gauteng |
| Silvertown Ext 5 | Dobsonville | Gauteng |
| Thulani Block 3 | Dobsonville | Gauteng |
| Thulani Ext 1 | Dobsonville | Gauteng |
| Dobsonville | Soweto | Gauteng |
| Mmesi Park | Soweto | Gauteng |