| Place | Post Code |
|---|---|
| Bayswater, Knox | 3153 |
| Boronia, Knox | 3155 |
| Ferntree Gully, Knox | 3156 |
| Knox City Centre, Knox | 3152 |
| Knoxfield, Knox | 3180 |
| Lysterfield, Knox | 3156 |
| Mountain Gate, Knox | 3156 |
| Rowville, Knox | 3178 |
| Scoresby, Knox | 3179 |
| Studfield, Knox | 3152 |
| The Basin, Knox | 3154 |
| Upper Ferntree Gully, Knox | 3156 |
| Wantirna, Knox | 3152 |
| Wantirna South, Knox | 3152 |