An embodiment of this invention provides a secure, integrated and hierarchical database to store phone numbers of services, along with personal protected information required by the service. This hierarchical data is stored for an individual or a group of individuals and will be made available when they place a call to one of the service phone numbers stored in the application. One of the solutions described in this disclosure allows a user to register frequently-used phone numbers, and any personal data required by the associated services, on a web site under a password protected account associated with the user. The user(s) can access this information by dialing a phone number. This way, the enrolled users can place a call to any registered phone number by first calling a predetermined number and then navigating to the desired number.