| Company name | Reg. code |
|---|---|
| VILTEL OÜ (former name Infostin OÜ) | 11208011 |
| VILBEL OÜ | 10511380 |
| VILTEK OÜ | 16963835 |
| VILATEL OÜ | 12668163 |
| VILTER GRUPP OÜ kustutatud | 12242056 |
| NORDMEL OÜ (former name Vilmel OÜ) | 14122184 |
| KITTEL & KITTEL OÜ | 10741080 |
| VIKTEL INTERNATIONAL OÜ | 11033706 |
| VIRTEL GRUPP OÜ | 10517750 |
| KISTEL OÜ kustutatud | 12252793 |
| KALTEL OÜ | 12067251 |
| KIRTEL OÜ | 12439540 |
| MIRTEL OÜ | 16756697 |
| OVITEL OÜ | 12765498 |
| SILTEK OÜ | 14077791 |
| MILTEK OÜ | 12713047 |
| MILTER OÜ | 12712728 |
| LINTEL OÜ | 16078688 |
| HALTEL OÜ kustutatud | 10099077 |
| RIMTEL OÜ | 12483535 |
| BILTEX OÜ | 10171205 |
| KILTEX OÜ | 16535157 |
| PIRTEL OÜ kustutatud | 10349614 |
| MIRTEL OÜ kustutatud | 12726191 |
| ELITEL OÜ | 16737091 |
| KILTER OÜ | 11302253 |
| RIFTEL OÜ | 16585600 |
| NILTEK OÜ | 12963382 |
| BIITEL OÜ | 11409956 |
| NILIEL OÜ | 12194239 |
| OFF-KILTER OÜ kustutatud | 16159553 |
| FILTER EUROPE OÜ (former name Filter Waste OÜ) | 12615706 |
| MIRTEL TEXTILE OÜ | 11391920 |
| FILTER PLUS OÜ (former name Dagoterm OÜ) | 14610854 |
| FILTER24.EE OÜ kustutatud | 11862294 |
| HILTEX CAPITAL OÜ kustutatud | 10843136 |
| FILTER HOLDING OÜ kustutatud | 16100459 |
| FILTER EXPRESS OÜ | 12325517 |
| FILTER FORGE OÜ kustutatud (former name Matterlist OÜ) | 14321156 |
| ACCOUNT PILVEL OÜ | 14457252 |
| EVITEL GROUP OÜ kustutatud | 12169282 |
| FILTER SERVICE OÜ | 11987794 |
| KITTEL MOOD OÜ | 16085582 |
| PIRTEL VÄLITÖÖD OÜ kustutatud | 11365302 |
| SILVEL TEENUS OÜ kustutatud | 10856156 |
| PIRTEL HOLDING OÜ | 11196029 |
| FILTER SOLUTIONS OÜ (former name Filter Holding OÜ) | 14532752 |
| ALITEL SYSTEMS OÜ | 17385843 |
| FOOD FILTER OÜ | 16667054 |
| MIRTEL COSMETICS OÜ | 14229539 |