| Sub-districts |
|---|
| Changanassery, Kottayam |
| Kanjirappally, Kottayam |
| Kottayam, Kottayam |
| Meenachil, Kottayam |
| Vaikom, Kottayam |
| All postal codes in Kerala |
|---|
| Alappuzha |
| Ernakulam |
| Idukki |
| Kannur |
| Kasaragod |
| Kollam |
| Kottayam |
| Kozhikode |
| Malappuram |
| Palakkad |
| Pathanamthitta |
| Thiruvananthapuram |
| Thrissur |
| Wayanad |