Abstract: A valid destination address is determined. An availability request is sent to each destination address from a set of destination addresses. The destination addresses are correlated with a destination party. At least one response to the sent availability requests is received. Each received response is uniquely associated with its own destination address from the destination addresses. Each received response indicates either a valid destination address or an invalid destination address. For each received response, a value associated with the destination address that is associated with that received response is recorded. The value indicates either a valid destination address or an invalid destination address based on the received response associated with that destination address.

Abstract: A system and method for generating and dynamically implementing multi-level licenses for accessing mobile content through a mobile network. The multi-level license is defined by a user in the form of a tree structure, whose nodes represent the different licenses that can be selected by a client. The client can select one or more license(s) from a set of license options available at that node. Each license option is associated with a license consisting of a license type and a price. The license type may be a count-based access license, duration-based access license, or an unlimited access license. The license(s) selected by the client is tracked by the system. As soon as the associated license expires, the client is presented with a next set of license options, in accordance with the multi-level license. The user can also analyze the financial aspects of the multi-level license by associating probability with each node in the tree structure.

Abstract: A valid destination address is determined. An availability request is sent to each destination address from a set of destination addresses. The destination addresses are correlated with a destination party. At least one response to the sent availability requests is received. Each received response is uniquely associated with its own destination address from the destination addresses. Each received response indicates either a valid destination address or an invalid destination address. For each received response, a value associated with the destination address that is associated with that received response is recorded. The value indicates either a valid destination address or an invalid destination address based on the received response associated with that destination address.

Abstract: A valid destination address is determined. An availability request is sent to each destination address from a set of destination addresses. The destination addresses are correlated with a destination party. At least one response to the sent availability requests is received. Each received response is uniquely associated with its own destination address from the destination addresses. Each received response indicates either a valid destination address or an invalid destination address. For each received response, a value associated with the destination address that is associated with that received response is recorded. The value indicates either a valid destination address or an invalid destination address based on the received response associated with that destination address.