The current postal code system in Ecuador uses a six digit format. The first two digits of the postal code correspond to one of the provinces of Ecuador and the second two digits correspond to a Canton(district) of Ecuador.
| Province | Postal Code Prefix |
|---|---|
| Azuay | 01xxxx |
| Bolívar | 02xxxx |
| Cañar | 03xxxx,90xxxx |
| Carchi | 04xxxx |
| Chimborazo | 06xxxx |
| Cotopaxi | 05xxxx |
| El Oro | 07xxxx |
| Esmeraldas | 08xxxx |
| Galápagos | 20xxxx |
| Guayas | 09xxxx |
| Imbabura | 10xxxx,90xxxx |
| Loja | 11xxxx |
| Los Ríos | 12xxxx |
| Manabí | 13xxxx,90xxxx |
| Morona Santiago | 14xxxx |
| Napo | 15xxxx |
| Orellana | 22xxxx |
| Pastaza | 16xxxx |
| Pichincha | 17xxxx |
| Santa Elena | 24xxxx |
| Santo Domingo de los Tsáchilas | 08xxxx,23xxxx |
| Sucumbíos | 21xxxx |
| Tungurahua | 18xxxx |
| Zamora Chinchipe | 19xxxx |