| City | STD Code |
| Adimaly | 04864 |
| Adoor | 04734 |
| Agathy | 04894 |
| Alathur | 04922 |
| Alleppy | 0477 |
| Amini | 04891 |
| Androth | 04893 |
| Attingal | 0470 |
| Badagara | 0496 |
| Bitra | 04890 |
| Calicut | 0495 |
| Cannanore | 0497 |
| Chetlet | 04899 |
| Ernakulam | 0484 |
| Irinjalakuda | 0480 |
| Kadamath | 04897 |
| Kalpeni | 04895 |
| Kalpetta | 04936 |
| Kanhangad | 04997 |
| Kanjirapally | 04828 |
| Karungapally | 0476 |
| Kasargode | 04994 |
| Kavarathy | 04896 |
| Kiltan | 04898 |
| Koduvayur | 04923 |
| Kottayam | 0481 |
| Kunnamkulam | 04885 |
| Mananthodi | 04935 |
| Manjeri | 0483 |
| Mannarghat | 04924 |
| Mavelikkara | 0479 |
| Minicoy | 04892 |
| Munnar | 04865 |
| Muvattupuzha | 0485 |
| Nedumandad | 04728 |
| Nedumgandam | 04868 |
| Nilambur | 04931 |
| Palai | 04822 |
| Palghat | 0491 |
| Pathaanamthitta | 0468 |
| Payyanur | 04985 |
| Peermedu | 04869 |
| Perinthalmanna | 04933 |
| Punalur | 0475 |
| Quilon | 0474 |
| Ranni | 04735 |
| Shertallai | 0478 |
| Shoranur | 04926 |
| Taliparamba | 04982 |
| Tellicherry | 0490 |
| Thiruvananthapuram | 0471 |
| Thodupuzha | 04862 |
| Tirur | 0494 |
| Tiruvalla | 0469 |
| Trichur | 0487 |
| Uppala | 04998 |
| Vadakkanchery | 04884 |
| Vikom | 04829 |
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