The phrase "free dateline" refers to a service which allows you to make calls or chat with someone without having to pay for the time spent on the call. It means you can communicate with someone for free.
Sentences with «free dateline»
Thrilling chats at Free dateline numbers. (rock-on.mobi)
Personals, singles and more at Free dateline numbers. (rockchat.info)
Meet men and women from Free dateline numbers. (rockchat.co)