A method, a device, and a non-transitory storage medium are described in which a inter-networked lawful intercept service is provided. The inter-networked lawful intercept service may include providing lawful intercept information from a proxy call session control function to a future generation core network device. The proxy call session control function may be resident in an Internet Protocol Multimedia Subsystem network. The proxy call session control function may use a Diameter message that includes the lawful intercept information. The future generation core network device may be a policy control function. The lawful intercept information may be further provided to other core network devices, such as a session management function and a use plane function.