| Postal Code | Locality / District | Administrative Area | Coordinates |
|---|---|---|---|
| Ambanja | Ambanja District · Diana Region | -13.669, 48.453 | |
| Tsaralalana | 1er Arrondissement · Analamanga Region | -18.9, 47.51667 | |
| Ifanadiana | Ifanadiana District · Vatovavy Region | -21.3, 47.63333 | |
| Mananjara | 1er Arrondissement · Analamanga Region | -18.91667, 47.51667 | |
| Voriampo | Ifanadiana District · Vatovavy Region | -21.2, 47.7 | |
| Zahary | Ambanja District · Diana Region | -14.03333, 47.98333 | |
| Mahamasina | 1er Arrondissement · Analamanga Region | -18.9, 47.51667 | |
| Tsiroanomandidy | Ambanja District · Diana Region | -13.86667, 48.36667 | |
| Volovandana | Ifanadiana District · Vatovavy Region | -20.98333, 47.66667 | |
| Isotry | 1er Arrondissement · Analamanga Region | -18.9, 47.51667 | |
| Tsararevorevo | Ambanja District · Diana Region | -13.61667, 48.38333 | |
| Vohitromby | Ifanadiana District · Vatovavy Region | -20.85, 47.71667 | |
| Vohitrarivo | Ifanadiana District · Vatovavy Region | -20.93333, 47.73333 | |
| Isoraka | 1er Arrondissement · Analamanga Region | -18.9, 47.51667 | |
| Tsarabanjabe | Ambanja District · Diana Region | -13.76667, 48.1 | |
| Fiadanana | 1er Arrondissement · Analamanga Region | -18.91667, 47.51667 | |
| Tanambaoandranomody | Ambanja District · Diana Region | -13.9, 48.01667 | |
| Vohitrandriana | Ifanadiana District · Vatovavy Region | -20.61667, 47.7 | |
| Befelatanana | 1er Arrondissement · Analamanga Region | -18.9, 47.51667 | |
| Sorony | Ambanja District · Diana Region | -13.65, 47.9 | |
| Vohimena | Ifanadiana District · Vatovavy Region | -21.1, 47.6 | |
| Antsahavola | 1er Arrondissement · Analamanga Region | -18.9, 47.51667 | |
| Sangajira | Ambanja District · Diana Region | -13.88333, 47.88333 | |
| Vohimasina | Ifanadiana District · Vatovavy Region | -21.05, 47.6 |
Postal code prefix 31 in Madagascar covers 24 localities (primarily in Diana Region, including Ambanja), spanning from 311 to 318.
There are 8 active postal codes starting with 31 in Madagascar. Use the interactive directory table above to filter by locality or copy any code in one click.