As a box code, 6011 is used for 8 post office box locations.
PO Boxes using 6011
| Suburb | Town | Province |
|---|---|---|
| Beachview | Emerald Hill | Eastern Cape |
| Blue Horizon Bay | Emerald Hill | Eastern Cape |
| Chelsea | Emerald Hill | Eastern Cape |
| Little Chelsea | Emerald Hill | Eastern Cape |
| Schoenmakerskop | Emerald Hill | Eastern Cape |
| Emerald Hill | Gqeberha (Port Elizabeth) | Eastern Cape |
| Mount Pleasant | Gqeberha (Port Elizabeth) | Eastern Cape |
| Sea View | Gqeberha (Port Elizabeth) | Eastern Cape |