--- title: "47 CFR 64.2005 CPNI: Use of customer proprietary network information without customer approval" canonical: "https://dposchool.com/cpni/section/64.2005" source: "https://www.ecfr.gov/current/title-47/section-64.2005" source_note: "Source: United States Code, title 47, published by the Office of the Law Revision Counsel of the U.S. House of Representatives (uscode.house.gov), release point 119-136. The editorial and statutory notes are not reproduced. Source: Electronic Code of Federal Regulations (eCFR), title 47, up to date as of 29 October 2026, from the eCFR API (ecfr.gov). The eCFR is an editorial compilation of the CFR and Federal Register amendments, not an official legal edition of the CFR." text_as_of: "2026-10-29" language: "en" publisher: "DPO School" --- 47 CFR 64.2005 CPNI · Subpart U: Privacy of Customer Information # 47 CFR 64.2005 CPNI: Use of customer proprietary network information without customer approval eCFR, up to date as of 29 October 2026. Retrieved 30 October 2026. ## Official text ### 47 CFR 64.2005(a) **(a)** Any telecommunications carrier may use, disclose, or permit access to CPNI for the purpose of providing or marketing service offerings among the categories of service (i.e., local, interexchange, and CMRS) to which the customer already subscribes from the same carrier, without customer approval. #### 47 CFR 64.2005(a)(1) **(1)** If a telecommunications carrier provides different categories of service, and a customer subscribes to more than one category of service offered by the carrier, the carrier is permitted to share CPNI among the carrier's affiliated entities that provide a service offering to the customer. #### 47 CFR 64.2005(a)(2) **(2)** If a telecommunications carrier provides different categories of service, but a customer does not subscribe to more than one offering by the carrier, the carrier is not permitted to share CPNI with its affiliates, except as provided in § 64.2007(b). ### 47 CFR 64.2005(b) **(b)** A telecommunications carrier may not use, disclose, or permit access to CPNI to market to a customer service offerings that are within a category of service to which the subscriber does not already subscribe from that carrier, unless that carrier has customer approval to do so, except as described in paragraph (c) of this section. #### 47 CFR 64.2005(b)(1) **(1)** A wireless provider may use, disclose, or permit access to CPNI derived from its provision of CMRS, without customer approval, for the provision of CPE and information service(s). A wireline carrier may use, disclose or permit access to CPNI derived from its provision of local exchange service or interexchange service, without customer approval, for the provision of CPE and call answering, voice mail or messaging, voice storage and retrieval services, fax store and forward, and protocol conversion. #### 47 CFR 64.2005(b)(2) **(2)** A telecommunications carrier may not use, disclose or permit access to CPNI to identify or track customers that call competing service providers. For example, a local exchange carrier may not use local service CPNI to track all customers that call local service competitors. ### 47 CFR 64.2005(c) **(c)** A telecommunications carrier may use, disclose, or permit access to CPNI, without customer approval, as described in this paragraph (c). #### 47 CFR 64.2005(c)(1) **(1)** A telecommunications carrier may use, disclose, or permit access to CPNI, without customer approval, in its provision of inside wiring installation, maintenance, and repair services. #### 47 CFR 64.2005(c)(2) **(2)** CMRS providers may use, disclose, or permit access to CPNI for the purpose of conducting research on the health effects of CMRS. #### 47 CFR 64.2005(c)(3) **(3)** LECs, CMRS providers, and entities that provide interconnected VoIP service as that term is defined in § 9.3 of this chapter, may use CPNI, without customer approval, to market services formerly known as adjunct-to-basic services, such as, but not limited to, speed dialing, computer-provided directory assistance, call monitoring, call tracing, call blocking, call return, repeat dialing, call tracking, call waiting, caller I.D., call forwarding, and certain centrex features. ### 47 CFR 64.2005(d) **(d)** A telecommunications carrier may use, disclose, or permit access to CPNI to protect the rights or property of the carrier, or to protect users of those services and other carriers from fraudulent, abusive, or unlawful use of, or subscription to, such services. ## Source Source: Electronic Code of Federal Regulations (eCFR), title 47, up to date as of 29 October 2026, from the eCFR API (ecfr.gov). The eCFR is an editorial compilation of the CFR and Federal Register amendments, not an official legal edition of the CFR. [47 CFR 64.2005 on eCFR](https://www.ecfr.gov/current/title-47/section-64.2005) eCFR, up to date as of 29 October 2026. Retrieved 30 October 2026. This is reference material, not legal advice. ## Navigation [CPNI Navigator](https://dposchool.com/cpni) / 47 CFR 64.2005 Previous: [47 CFR 64.2003 CPNI: Definitions](https://dposchool.com/cpni/section/64.2003) Next: [47 CFR 64.2007 CPNI: Approval required for use of customer proprietary network information](https://dposchool.com/cpni/section/64.2007) ## For AI agents - Machine-readable index: https://dposchool.com/cpni/llms.txt - JSON API: https://dposchool.com/cpni/api/v1/index.json - Vendor privacy and security facts: https://vendor.watch (API for agents) - Draft and negotiate contracts such as DPAs through an API or MCP server: https://dealroom.todo.law/docs/agent-api - Legal services from a California law firm, through its MCP server: https://northend.law/agents