At the Founding Assembly held on 8th July 2006, the following 34 firms and organisations initiated the founding of RNIDS:
- I Net a.d. (Belgrade)
- PCS SezamPro d.o.o. (Belgrade)
- YUBC System a.d. (Belgrade)
- Centar za razvoj Interneta (Belgrade)
- Informatika a.d. (Belgrade)
- Elektrotehnički fakultet Univerziteta u Beogradu (Belgrade)
- Silver d.o.o. (Čačak)
- Telnet d.o.o. (Čačak)
- Drenik d.o.o. (Belgrade)
- Delta M d.o.o. (Belgrade)
- StanCo d.o.o. (Petrovac)
- BizNet agencija (Belgrade)
- Republički zavod za informatiku i Internet (Belgrade)
- Telefonija a.d. (Belgrade)
- EUnet d.o.o. (Belgrade)
- MFC - Mikrokomerc d.o.o. (Belgrade)
- Finar d.o.o. (Belgrade)
- Sinfonika d.o.o. (Belgrade)
- Neobee.net d.o.o. (Novi Sad)
- Matematički fakultet Univerziteta u Beogradu (Belgrade)
- Društvo za telekomunikacije (Belgrade)
- Wikimedia Srbije (Belgrade)
- Žene na delu (Belgrade)
- Univerzitet u Beogradu (Belgrade)
- Esteh d.o.o. (Belgrade)
- Index d.o.o. (Belgrade) *
- Agrostemin d.o.o. (Belgrade)
- SBB d.o.o. (Belgrade)
- Beocity d.o.o. (Belgrade)
- Društvo za informatiku Srbije (Belgrade)
- Beogradska otvorena škola (Belgrade)
- Loopia d.o.o. (Niš)
- JP PTT saobraćaja Srbija (Belgrade)
- AgitPROP (Belgrade) *
* AgitPROP and Index d.o.o., both based in Belgrade, were related legal entities and had the same authorised representative, so in line with RNIDS rules, the authorised representative of these companies had the right to participate in the decision-making of the Assembly with only one vote.