| Company name | Reg. code |
|---|---|
| SINGSONG OÜ | 12391833 |
| NGAPE SINGAUNG OÜ kustutatud (former name REKOM TRANS OÜ) | 11995227 |
| SINGING BRUSHES OÜ | 12926174 |
| TINGLONG OÜ | 17474191 |
| XINGNONG OÜ kustutatud | 11984956 |
| TSINSONG OÜ | 14872229 |
| WINGSON OÜ | 14814143 |
| INSONG OÜ | 16558106 |
| PINGPONG CONSULT OÜ (former name Pingpong Marketing OÜ) | 12104495 |
| ANSIPING SONGTONG OÜ kustutatud (former name Fillehitus OÜ) | 14797663 |
| SUNSONG TRADING OÜ | 12687219 |
| EUROPEAN ECO-CAPITALS OÜ (former name Singing City OÜ) | 11905052 |