As a box code, 4450 is used for 15 post office box locations.
PO Boxes using 4450
| Suburb | Town | Province |
|---|---|---|
| Blythedale Beach | Stanger | KwaZulu-Natal |
| Bulwer Farm | Stanger | KwaZulu-Natal |
| Empungeni | Stanger | KwaZulu-Natal |
| Groutville | Stanger | KwaZulu-Natal |
| Kwadukuza | Stanger | KwaZulu-Natal |
| Larkfield | Stanger | KwaZulu-Natal |
| Lindelani | Stanger | KwaZulu-Natal |
| Mabhedwini | Stanger | KwaZulu-Natal |
| Mbolombe | Stanger | KwaZulu-Natal |
| Melville | Stanger | KwaZulu-Natal |
| Oqadeni | Stanger | KwaZulu-Natal |
| Prospect Farm | Stanger | KwaZulu-Natal |
| Qalakancane | Stanger | KwaZulu-Natal |
| Shakaville | Stanger | KwaZulu-Natal |
| Stanger | Stanger | KwaZulu-Natal |