As a box code, 2351 is used for 3 post office box locations.
Suburbs using 2351 as street code
| Suburb | Town | Province |
|---|---|---|
| Cassim Park | Ermelo | Mpumalanga |
| De Bruinpark | Ermelo | Mpumalanga |
| Ermelo | Ermelo | Mpumalanga |
| Ermelo Ext 1 | Ermelo | Mpumalanga |
| Ermelo Ext 14 | Ermelo | Mpumalanga |
| Ermelo Ext 18 | Ermelo | Mpumalanga |
| Ermelo Ext 2 | Ermelo | Mpumalanga |
| Ermelo Ext 33 | Ermelo | Mpumalanga |
| Ermelo Ext 4 | Ermelo | Mpumalanga |
| Ermelo Ext 6 | Ermelo | Mpumalanga |
| Everestpark | Ermelo | Mpumalanga |
| George Bothapark | Ermelo | Mpumalanga |
| John Vorsterpark | Ermelo | Mpumalanga |
| Katshabalala | Ermelo | Mpumalanga |
| Klipbou | Ermelo | Mpumalanga |
| Nederlandpark | Ermelo | Mpumalanga |
| Phumula | Ermelo | Mpumalanga |
| Sun City | Ermelo | Mpumalanga |
| Tembisa | Ermelo | Mpumalanga |
| Wesselton | Ermelo | Mpumalanga |
| Wesselton Ext 1 | Ermelo | Mpumalanga |
| Wesselton Ext 2 | Ermelo | Mpumalanga |
| Wesselton Ext 3 | Ermelo | Mpumalanga |
| Wesselton Ext 4 | Ermelo | Mpumalanga |
| Wesselton Ext 5 | Ermelo | Mpumalanga |
| Wesselton Ext 6 | Ermelo | Mpumalanga |
PO Boxes using 2351
| Suburb | Town | Province |
|---|---|---|
| George Bothapark | Ermelo | Mpumalanga |
| Sun City | Ermelo | Mpumalanga |
| Wesselton Ext 5 | Ermelo | Mpumalanga |