The growth in demand for IP telephony services is accelerating in the Netherlands, according to new research from Telecompaper. The country had 853,000 consumer VoIP subscriptions at the end of March 2006, up from 647,000 at the start of the year. The study highlights that former monopoly KPN has seen its share of the consumer fixed market eroded by cable and ADSL service providers which have turned users onto the benefits of VoIP telephony. As a result, more than 10% of Dutch households were connected through cable or ADSL-based VoIP fixed telephony access lines at the end of the first quarter. In the same period, the penetration of traditional PSTN and ISDN access lines dipped to an estimated 72.7% of households, down from 83.1% in March 2005.