As a box code, 0101 is used for 23 post office box locations.
PO Boxes using 0101
| Suburb | Town | Province |
|---|---|---|
| Mamelodi Block K | Mamelodi | Gauteng |
| Mamelodi West | Mamelodi | Gauteng |
| Mamelodi West Section A | Mamelodi | Gauteng |
| Mamelodi West Section B | Mamelodi | Gauteng |
| Mamelodi West Section C | Mamelodi | Gauteng |
| Mamelodi West Section D | Mamelodi | Gauteng |
| Mamelodi West Section E | Mamelodi | Gauteng |
| Mamelodi West Section F | Mamelodi | Gauteng |
| Mamelodi West Section H | Mamelodi | Gauteng |
| Mamelodi West Section J | Mamelodi | Gauteng |
| Mamelodi West Section K | Mamelodi | Gauteng |
| Mamelodi West Section L | Mamelodi | Gauteng |
| Mamelodi West Section M | Mamelodi | Gauteng |
| Mamelodi West Section N | Mamelodi | Gauteng |
| Mamelodi West Section O | Mamelodi | Gauteng |
| Mamelodi West Section P | Mamelodi | Gauteng |
| Mamelodi West Section Q | Mamelodi | Gauteng |
| Mamelodi West Section R | Mamelodi | Gauteng |
| Mamelodi West Section S | Mamelodi | Gauteng |
| Mamelodi West Section V | Mamelodi | Gauteng |
| Mamelodi | Pretoria | Gauteng |
| Mamelodi Section A | Pretoria | Gauteng |
| Mamelodi Section N | Pretoria | Gauteng |