CellQoS, a.s.
DWC Slovakia, a.s.
Orange Slovensko, a.s.
SYLEX s.r.o.
T - Mobile Slovensko, a.s.
Slovak Telekom, a.s.
Telefonica O2 Slovakia s.r.o.
Telefónica O2 Czech Republic, a.s.
Towercom, a.s.
UniNet-CsI, a. s.