The Number Portability Administration Center (NPAC) is operated by Neustar, and serves as the central mediation center for all LNP activity in Canada. The NPAC Service Management System (SMS) is used by the NPAC personnel to facilitate the porting of numbers. The NPAC is considered the telecom industry's common, authoritative database used for routing, rating and billing calls for telephone numbers that are no longer assigned to the original NPA-NXX code holder. The systems are all physically located in Sterling, VA with a backup site in Charlotte, NC.

Every Communications Service Provider that participates in LNP exchanges porting information with the NPAC SMS. Typically, subscription information is sent to the NPAC via the Low Tech Interface (LTI) or through the Communication Service Provider’s Service Order Administration (SOA) system. Porting notifications are received from the NPAC via the same systems. When a ported number is activated, network downloads are received from the NPAC SMS through the Communication Service Provider’s Local Service Management System (LSMS). The LTI is a Web-based screen that is accessed through the NPAC. A number of companies offer SOA and LSMS products. SOA products may be stand-alone or integrated with other parts of the OSS. LSMS products may be stand-alone or integrated with other network elements such as the STP.. Communications Service Providers can also contract with a service bureau for the SOA and LSMS functionality.