| ZIP | Locality | Prov | Region | Area Code | Belfiore | Notes | Locality | area code |
|---|---|---|---|---|---|---|---|---|
| 04020 | Campodimele | LT | Lazio | 0771 | B527 | Campodimele LT - Lazio | 0771 | |
| 04021 | Castelforte | LT | Lazio | 0771 | C104 | Castelforte LT - Lazio | 0771 | |
| 04022 | Fondi | LT | Lazio | 0771 | D662 | Fondi LT - Lazio | 0771 | |
| 04023 | Formia | LT | Lazio | 0771 | D708 | Formia LT - Lazio | 0771 | |
| 04024 | Gaeta | LT | Lazio | 0771 | D843 | Gaeta LT - Lazio | 0771 | |
| 04020 | Itri | LT | Lazio | 0771 | E375 | Itri LT - Lazio | 0771 | |
| 04025 | Lenola | LT | Lazio | 0771 | E527 | Lenola LT - Lazio | 0771 | |
| 04026 | Minturno | LT | Lazio | 0771 | F224 | Minturno LT - Lazio | 0771 | |
| 04020 | Monte San Biagio | LT | Lazio | 0771 | F616 | Monte San Biagio LT - Lazio | 0771 | |
| 04027 | Ponza | LT | Lazio | 0771 | G871 | Ponza LT - Lazio | 0771 |