The Polaris Project operates the National Human Trafficking Resource Center (NHTRC) and its hotline which is used throughout the United States as the central number to call for help, leave tips, and get information on human trafficking. Their resources include numerous online trainings and print information on human trafficking for individuals and various groups (including law enforcement), legislative advocacy (state and national), case information, and more, all of which can be found at traffickingresourcecenter.org.