Privately owned television channels started to appear immediately after the regime change. Most were associated with a cable television (CATV) network run by the same parent company. Around 1994-1995 private over-the-air broadcasters also appeared, but they usually only operated within a single area. Nova Television and 7 Dni TV ("7 дни", meaning "7 days") were two of the first such channels, available only in Sofia. After bTV took over Efir 2's frequencies, another competition selected Nova Television, already popular in cable networks around the country, as the second privately owned national channel in Bulgaria. The authorities currently refuse to license further analogue terrestrial channels (including local ones), until DVB-T broadcasting is started.