A method for generating a list of telecommunication identifiers is provided. The method includes interpreting, via at least one processor, telecommunications data including available telecommunication identifiers, assigned telecommunication identifiers, in-use telecommunication identifiers, and disconnected telecommunication identifiers. The method further includes generating the list based at least in part on the telecommunications data, wherein the list includes telecommunication identifiers that are a subset of the available telecommunication identifiers. The method further includes transmitting the list.