| Sub-districts |
|---|
| Aluva, Ernakulam |
| Kanayannur, Ernakulam |
| Kochi, Ernakulam |
| Kothamangalam, Ernakulam |
| Kunnathunad, Ernakulam |
| Muvattupuzha, Ernakulam |
| Paravur, Ernakulam |
| All postal codes in Kerala |
|---|
| Alappuzha |
| Ernakulam |
| Idukki |
| Kannur |
| Kasaragod |
| Kollam |
| Kottayam |
| Kozhikode |
| Malappuram |
| Palakkad |
| Pathanamthitta |
| Thiruvananthapuram |
| Thrissur |
| Wayanad |