As a box code, 4019 is used for 18 post office box locations.
PO Boxes using 4019
| Suburb | Town | Province |
|---|---|---|
| Cranbrook Park | Durban North | KwaZulu-Natal |
| Draeger Place | Durban North | KwaZulu-Natal |
| Frosterley Park | Durban North | KwaZulu-Natal |
| Holwood Park | Durban North | KwaZulu-Natal |
| Mount Moriah | Durban North | KwaZulu-Natal |
| Nollsworth Park | Durban North | KwaZulu-Natal |
| Pencarrow Park | Durban North | KwaZulu-Natal |
| Rydal Vale Park | Durban North | KwaZulu-Natal |
| Shanva Hills | Durban North | KwaZulu-Natal |
| Sinembe Park | Durban North | KwaZulu-Natal |
| Sunbury Park | Durban North | KwaZulu-Natal |
| Sunningdale | Durban North | KwaZulu-Natal |
| Sunningdale 2 | Durban North | KwaZulu-Natal |
| Sunningdale Cluster 1 | Durban North | KwaZulu-Natal |
| Sunningdale Fernlea | Durban North | KwaZulu-Natal |
| The Gardens | Durban North | KwaZulu-Natal |
| Torsvale Park | Durban North | KwaZulu-Natal |
| La Lucia Ridge | La Lucia | KwaZulu-Natal |