Area Codes in Niterói
| Area Code▲ | City↕ | Administrative Region↕ | City Population↕ | Country/Region | Timezone |
|---|---|---|---|---|---|
| 21 | Rio de Janeiro | Rio de Janeiro (state) | 6,023,699 | Brazil | America/Sao_Paulo |
Nearby Cities
| City | Region | Country | Population | Area Codes | Postal Codes |
|---|---|---|---|---|---|
| Duque de Caxias | Rio de Janeiro (state) | Brazil | 818,329 | 21 | 25000, 25010, 25011, 25015 |
| Nova Iguaçu | Rio de Janeiro (state) | Brazil | 1,002,118 | 21 | 26010, 26011, 26012, 26013 |
| Rio de Janeiro | Rio de Janeiro (state) | Brazil | 6,023,699 | 21 | 20000, 20010, 20011, 20020 |
| São Gonçalo, Rio de Janeiro | Rio de Janeiro (state) | Brazil | — | 21 | 24400, 24410, 24411, 24412 |
| São João de Meriti | Rio de Janeiro (state) | Brazil | 454,849 | 21 | 25500, 25510, 25515, 25520 |