Karainagar Postal Code
| City | Postal Code | District |
|---|---|---|
| Kayts | 40270 | Jaffna |
| Elluvaithivu | 40275 | Jaffna |
| Analaithivu | 40280 | Jaffna |
| Velanai | 40300 | Jaffna |
| Punguduthivu | 40330 | Jaffna |
| Nainativu | 40360 | Jaffna |
| Delft | 40370 | Jaffna |
| Delft West | 40378 | Jaffna |
| Kaitadi | 40400 | Jaffna |
| Chavakachcheri | 40500 | Jaffna |
| Meesalai | 40510 | Jaffna |
| Karaveddi | 40520 | Jaffna |
| Velvetiturai | 40540 | Jaffna |
| Thondamanaru | 40545 | Jaffna |
| Point Pedro | 40600 | Jaffna |