Durham Public Schools Authorized Investment Providers For specific investment provider information, please click on the investment provider name of your choice to visit the company's website. 403(b) IPX-FPS(844) 788-3474 ext: 5 457(b) Horace Mann Insurance Company(800) 999-1030 Lincoln Investment Planning, LLC(800) 242-1421 Prudential Retirement(866) 627-5267 ReliaStar Life - Subsidiary of VOYA Financial(877) 882-5050