| Lieu | Code postal |
|---|---|
| Babuyan Claro, Calayan | 3520 |
| Balatubat, Calayan | 3520 |
| Cabudadan, Calayan | 3520 |
| Centro II, Calayan | 3520 |
| Dadao, Calayan | 3520 |
| Dalupiri, Calayan | 3520 |
| Dibay, Calayan | 3520 |
| Dilam, Calayan | 3520 |
| Magsidel, Calayan | 3520 |
| Minabel, Calayan | 3520 |
| Naguilian, Calayan | 3520 |
| Poblacion, Calayan | 3520 |