Area Codes in Onefour
| Area Code▲ | City↕ | Administrative Region↕ | City Population↕ | Country/Region | Timezone |
|---|---|---|---|---|---|
| 403 | Calgary | Alberta | 1,019,942 | Canada | America/Edmonton |
Nearby Cities
| City | Region | Country | Population | Area Codes | Postal Codes |
|---|---|---|---|---|---|
| Gildford, Montana | Montana | United States | 179 | 406 | 59525 |
| Hingham, Montana | Montana | United States | 118 | 406 | 59528 |
| Inverness, Montana | Montana | United States | 55 | 406 | 59530 |
| Joplin, Montana | Montana | United States | 157 | 406 | — |
| Rudyard, Montana | Montana | United States | 258 | 406 | 59540 |