| Area Code▲ | City↕ | Administrative Region↕ | City Population↕ | Country/Region | Timezone |
|---|
| 1 | Ljubljana | City Municipality of Ljubljana | 272,220 | Slovenia | Europe/Ljubljana |
| 2 | Maribor | Maribor | 95,171 | Slovenia | Europe/Ljubljana |
| 3 | Celje | City Municipality of Celje | 37,520 | Slovenia | Europe/Ljubljana |
| 30 | — | — | 2,007,000 | Slovenia | Europe/Ljubljana |
| 31 | — | — | 2,007,000 | Slovenia | Europe/Ljubljana |
| 4 | Kranj | Kranj | 36,874 | Slovenia | Europe/Ljubljana |
| 40 | — | — | 2,007,000 | Slovenia | Europe/Ljubljana |
| 41 | — | — | 2,007,000 | Slovenia | Europe/Ljubljana |
| 49 | — | — | 2,007,000 | Slovenia | Europe/Ljubljana |
| 5 | Koper | Koper | 24,996 | Slovenia | Europe/Ljubljana |
| 51 | — | — | 2,007,000 | Slovenia | Europe/Ljubljana |
| 59 | — | — | 2,007,000 | Slovenia | Europe/Ljubljana |
| 64 | — | — | 2,007,000 | Slovenia | Europe/Ljubljana |
| 7 | Novo Mesto | City Municipality of Novo Mesto | 23,341 | Slovenia | Europe/Ljubljana |
| 70 | — | — | 2,007,000 | Slovenia | Europe/Ljubljana |
| 71 | — | — | 2,007,000 | Slovenia | Europe/Ljubljana |
| 80 | — | — | 2,007,000 | Slovenia | Europe/Ljubljana |
| 89 | — | — | 2,007,000 | Slovenia | Europe/Ljubljana |
| 90 | — | — | 2,007,000 | Slovenia | Europe/Ljubljana |