| Sub-districts |
|---|
| Alathur, Palakkad |
| Chittur, Palakkad |
| Mannarkad, Palakkad |
| Ottappalam, Palakkad |
| Palakkad, Palakkad |
| All postal codes in Kerala |
|---|
| Alappuzha |
| Ernakulam |
| Idukki |
| Kannur |
| Kasaragod |
| Kollam |
| Kottayam |
| Kozhikode |
| Malappuram |
| Palakkad |
| Pathanamthitta |
| Thiruvananthapuram |
| Thrissur |
| Wayanad |