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YO4SX
| Country: | Romania |
| Callsign details: | Romania, Braila, Constanta, Galati, Tulcea, Vrancea |
| CQ: | 20 |
| ITU: | 28 |
| Latitude: | 44.17 |
| Longitude: | 28.63 |
| UTC offset: | -2 |
| Continent: | EU |