The Viber instant messaging application is in talks to be acquired for $300 million-$400 million by a leading instant messaging company from Asia, the Calcalist financial newspaper reported on Tuesday. Viber is run from Cyprus by Israeli entrepreneur Talmon Marco and has development centers in Belarus and Israel. Viber has about 200 million registered users in 193 countries. It launched an instant messaging app for personal computers that allows users to make outgoing mobile calls to other Viber usersand to non-registered mobiles, making it a rival to Skype.