Mobile operators:
- Orange Slovensko, www.orange.sk
- Slovak Telekom, (T-Mobile and Slovak Telekom merged as of July 1, 2010 and the latter became the successor company)
www.t-mobile.sk
- Telefónica O2 Slovakia,www.sk.o2.com
Some providers of fixed-line services:
- Antik Telecom,www.antik.sk
- GTS Slovakia,www.gts.sk
- Orange Slovensko,www.orange.sk
- Slovak Telekom,www.slovaktelekom.sk
- Slovanet,www.slovanet.sk
- Swan,www.swan.sk
- UPC Broadband Slovakia,www.upc.sk
- ŽSR - Železničné Telekomunikácie,www.zt.sk
Other companies active in telecommunications:
- Digi Slovakia,www.digislovakia.sk
- Energotel,www.energotel.sk
- Nokia Siemens Networks Slovakia,www.nokiasiemensnetworks.com
- Satro,www.satro.sk
- SES Astra,www.ses-astra.com
- Towercom,www.towercom.sk
- Vnet,www.vnet.sk
- WiMAX Telecom Slovakia,www.wmx.sk
