ELI5: Explain Like I'm 5

Customer proprietary network information

Customer Proprietary Network Information (or CPNI) are the kinds of information that your phone company, internet provider, or cable company collects from you. It includes things like what services you have, who you are calling, and how much you use each service. Your phone company and other service providers use this information to make sure their services work properly and to create new services. The service providers might also share this information with other companies for marketing and business purposes. CPNI helps make sure that your phone and other services work as intended.