554170 Text Message

I am looking for a website/a program where I will be able to send mass text messages from a computer to a mobile phone numbers. I want to be able to add the numbers from a csv file and or copy paste. the messages will be sent to mobile carriers in different countries. I have the list of gateway addresses if its going to help sample site to look at [login to view URL] 1. I want to know how long it would take 2. how much it will cost 3. what type of server needed