The National Human Trafficking Hotline (NHTH) serves victims and survivors of human trafficking and the anti-trafficking community in the United States. The program’s mission is to provide human trafficking victims and survivors with access to critical support and services to get help and stay safe, and to equip the anti-trafficking community with the tools to effectively combat all forms of human trafficking. RTI is supporting the Administration for Children and Families (ACF) on its efforts to: (1) describe the activities, procedures, and organization of the NHTH Program, including staff training, staff capacity, and service delivery; (2) describe the customer service of the NHTH, for example who contacts the NHTH, and what information or assistance do they seek; (3) describe the immediate outcomes of the NHTH, specifically with regard to callers and users; and (4) explore the creation of one or more new performance measures, to enable NHTH to explain its activities and accomplishments in an ongoing way to stakeholders.