Recently we have observed the increased interest in telecommunications services of different king, including also Premium rate telephone numbers. premium rate telephone numbers are phone numbers for phone calls during which certain services are provided, and for which prices higher than normal are charged. Unlike a normal call, part of the call charge is paid to the service provider, thus enabling businesses to be funded via the calls. It is estimated that in our country there are several million messages of that type sent per month. The most frequent users of premium services are persons at the age of 20 to 30 years. Experts estimate that over time the number of people using this type of premium solution will increase and extend the age limits. How does it work in practice? The client sends a short text message to a special 4 - or 5-digit premium number that can be dedicated or shared. Premium rate telephone numbers apply twenty four hours a day, seven days a week. Premium short messages are the most commonly used for different paid services available. Services available under premium rate telephone numbers are, among others, contest, chats, voting, horoscopes and many other. Although they are more expensive than ordinary numbers they still find their fans.