Periyamadu Postal Code
| City | Postal Code | District |
|---|---|---|
| Iluppaikadavai | 41175 | Mannar |
| Aththimottai | 41180 | Mannar |
| Vellankulam | 41185 | Mannar |
| Tharapuram | 41190 | Mannar |
| Erukkalampiddy | 41200 | Mannar |
| Pesalai | 41210 | Mannar |
| Talaimannar | 41220 | Mannar |
| Mullaitivu | 42000 | Mullaitivu |
| Alampil | 42005 | Mullaitivu |
| Kokkuthoduvai | 42010 | Mullaitivu |
| Kokkilai | 42020 | Mullaitivu |
| Mullivaikkal | 42025 | Mullaitivu |
| Mulliyawalai | 42100 | Mullaitivu |
| Oddusuddan | 42200 | Mullaitivu |
| Muthayankaddakulam | 42210 | Mullaitivu |