Methods and systems of providing toll-free services access from a telecommunications network to a mobile device supported by toll-free telecommunications networks entail placing a called telephone number on a service provider's telecommunications network by identifying the called telephone number as a toll-free call, querying a database for called telephone number information for routing to a destination number, and routing the called telephone number using the called telephone number information through the service provider's telecommunications network to a wireless telecommunications network. The called telephone number is routed through the wireless telecommunications network by mapping the called telephone number and information to a mobile service identification number that identifies a mobile device hosted by a mobile switching center. A connection between the mobile switching center and the mobile device using the mobile service identification number is established to connect the toll-free call to the mobile device.