A system and a method for organizing, synchronizing, and sharing cumulative contact information are disclosed, along with a method for combining and updating contact profiles by linking personal and corporate or group IDs. The system and the method revolutionize and simplify the way people share and update contact information because each user updates only the contact information of the user himself or herself. Then the information is automatically synced and updated with other users (with whom the contact information was initially set to be shared).