Open Belgrade night championships 2023->Entries by countries (number of entries: 33)
| 1. | Abrosimov Vasilij | 8171989 | M35 | Individuals/No club | | |
| 2. | Sobolev Aleksei | | M21 | Individuals/No club | | |
Bulgaria |
| 1. | Stoev Mihail | 8162965 | M12 | Akademik Varna | Bulgaria | |
| 2. | Kostadinov Martin | 2136391 | M12 | Plovdiv Plovdiv | Bulgaria | |
| 3. | Antonova Nikoleta | 2136392 | M12 | Plovdiv Plovdiv | Bulgaria | |
| 4. | Mutafchieva Kristiana | 1235789 | M12 | Plovdiv Plovdiv | Bulgaria | |
| 5. | Kostadinov Alexander | 2029993 | M12 | Plovdiv Plovdiv | Bulgaria | |
| 6. | Mutafchiev Stefan | 8027182 | M45 | Plovdiv Plovdiv | Bulgaria | |
| 7. | Kostadinov Atanas | 8162998 | M45 | Plovdiv Plovdiv | Bulgaria | |
| 8. | Perilova Kamelia | 8025235 | W35 | Plovdiv Plovdiv | Bulgaria | |
| 9. | Onufrieva Niya | 8003180 | W18-20 | Variant 5 Targovishte | Bulgaria | |
| 10. | Raykov Atanas | 8055575 | M14 | DIANA | Bulgaria | |
| 11. | Dimitrova Denitsa | 8055570 | W14 | DIANA | Bulgaria | |
| 12. | Христова Даная | 2008643 | W14 | DIANA | Bulgaria | |
| 13. | Cholakova Plamena | 1401625 | W16 | DIANA | Bulgaria | |
| 14. | Pedeva Ivana | 8162929 | W18-20 | NSA-SIVEN | Bulgaria | |
| 15. | Radoslavov Aleks | 8122582 | M16 | ISTROS | Bulgaria | |
| 16. | Atanasov Alexandar | 8208266 | M16 | ISTROS | Bulgaria | |
| 17. | Stoyanova Emanuela | 8122582 | W16 | ISTROS | Bulgaria | |
| 18. | Asenova Raya | 8655708 | W18-20 | ISTROS | Bulgaria | |
Croatia |
| 1. | Vidaković Majda | 8445442 | W18-20 | OK Kapela | Croatia | |
| 2. | Bergant Vidaković Sandra | 2105097 | W35 | OK Kapela | Croatia | |
| 3. | Mareković Ira | 2100979 | W16 | OK Vihor | Croatia | |
Romania |
| 1. | Pavlov Andrei | 8656254 | M45 | MKE BUCHAREST | Romania | |
Russia |
| 1. | Vinogradova Galina | 8000132 | W21 | Alfta OSÄ | Russia | |
Serbia |
| 1. | Bojović Milena | 2800949 | W21 | PSD Kopaonik | Serbia | |
| 2. | Radovanović Dejan | 1140115 | M45 | OK Paracin | Serbia | |
| 3. | Radovanović Marko | 1413994 | M21 | OK Paracin | Serbia | |
Slovenia |
| 1. | Ferenc Ales | 8639666 | M21 | OK Tivoli | Slovenia | |
| 2. | Bončina Vianez | 422512 | M12 | OK SK | Slovenia | |
| 3. | Bončina Igor | 8639715 | M55 | OK SK | Slovenia | |
| 4. | Boncina Abigael Vanessa | 1968213 | W35 | OK SK | Slovenia | |
Spain |
| 1. | Veleda Diaz David | 8027878 | M45 | Club Orientació Catalunya | Spain | |