The traditional public switch telephone network continues to evolve to an all IP mobile network where end users have multiple internet devices tied to one or more telephone numbers. Also end users may bring their telephone numbers to different service networks (e.g. VoIP/VoLTE/Vo5G) of the same or different operators. Therefore the ability to efficiently determine number to IP/operator/service network mappings and portability information is becoming ever more important for the mobile network operator. The NetNumber ENUM+DNS is the world’s most widely deployed Carrier-ENUM solution in Fixed, Mobile, Cable, and IPX networks and has been hardened through experience to deliver market-leading scalability, performance, reliability, and flexibility. NetNumber combines ENUM with DNS services on the TITAN platform to provide a solution that also meets commercial/enterprise solution requirements such as private LTE and public safety networks.