| Area | Zip |
|---|---|
| Ampatuan | 9609 |
| Barira | 9614 |
| Buldon | 9615 |
| Buluan | 9616 |
| Cotabato City | 9600 |
| Datu Paglas | 9617 |
| Datu Piang | 9607 |
| Dinaig | 9601 |
| General S.K. Datun | 9618 |
| Kabuntulan | 9606 |
| Maganoy | 9608 |
| Matanog | 9613 |
| Pagalungan | 9610 |
| Parang | 9604 |
| South Upi | 9603 |
| Sultan Kudarat | 9605 |
| Sultan sa Barongis | 9611 |
| Talayan | 9612 |
| Upi | 9602 |