Hello, I´m lose whith the did numers or geografic numbers : 1.- You buy a did number to a VoIP provider. For example Spain, Valencia 96.333.33.33 2.- Somebody call´s to this number throught a Pstn line or VoIP line 3.- Who say that this number is my line if all i have is a VoIP number ?. Because this geografic numer belongs to Telefónica de España in my case. Is Telefónica de España ( in my case ) behind this and Telefonica de España routes the calls trought SoftSwitch to the VoIP provider ? If is this right, why the calls are more easy , leave to charge maintenance of the line and more advantages of the VoIP ? Is Telefonica loosing clientes and Telefonica is helping to do it ? I don´t understand this. ¿ Somebody knows how works this ?. Thanks.