U.S. Portability

Access U.S. number portability data from the only authorized source 

Our nation relies on connectivity. Companies require access to data regarding our nation’s more than 1.6 billion phone numbers to perform vital day-to-day operations, such as routing, rating, billing and telecommunication network maintenance. However, millions of businesses and consumers switch Service Providers each year. This makes accessing the most recent data critical.


Authorized Service Providers and Authorized Providers of Telecom-Related Services (PTRS) include:

  • Those that have an Operating Company Number (OCN) issued from the National Exchange Carrier Association (NECA), hold an Operating Authority, Certificate of Public Convenience and Necessity (CPCN), Radio License or VoIP Proof of Numbering and participate in porting numbers. 
  • Those that route, bill or rate telephone calls or perform network maintenance.
  • Interconnected VoIP providers that are not eligible to obtain numbering resources from the North American Numbering Plan Administration (NANPA)
  • Non-facilities-based resellers of interconnected VoIP services that use the number resources and facilities of an interconnected VoIP provider or traditional Public Switch Telephone Number (PSTN) reseller
  • Service Bureaus that perform porting work on behalf of a Service Provider
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Authorized NPAC users

There are strict guidelines on how NPAC data can be used. Authorized NPAC users can access data for routing, rating, billing and network maintenance in connection with providing or facilitating the provision of telecommunications services. 

Permitted Use

Solutions to meet your needs

The U.S. Number Portability Administration Center (NPAC) is the authoritative source for phone number porting information for all Service Providers in the United States, including wireline, wireless and Voice over Internet Protocol (VoIP) providers.  It can be used by authorized Service Providers and Providers of Telecom-Related Services (PTRS) for routing, rating, billing and network maintenance. In addition, businesses can access and use specific NPAC data for multiple purposes, including law enforcement investigations, certain aspects of TCPA compliance and risk assessment and fraud mitigation. 

Each of these solutions has been designed to allow businesses and organizations to access the information they require to perform specific functions. Organizations can subscribe to one or more in order to meet their unique requirements.

The Number Portability Industry Forum (NPIF) is the body that makes the decisions and recommendations that form the basis of the regulatory orders.

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