What is the company number for rli insurance company? Company Information. RLI INSURANCE COMPANY. 9025 N LINDBERGH DR. PEORIA, IL 61615. 800-331-4929. Old Company Names Effective Date. UNITED FOUNDERS NAT'L INS CO. 1973-10-19. Agent For Service.What happened to rli corp? As a holding company, RLI Corp operates through a group of subsidiaries, including the RLI Insurance Company, RLI Indemnity Company, and Mt. Hawley Insurance Company. The contact lens insurance business fell away over the years, and the company moved into different markets.How do i contact rli by phone? Contact RLI We want to hear from you. Feel free to submit an inquiry using the form below, or you can give us a call toll free at 800-331-4929 or 309-692-1000. If you are a producer and want information about appointments, please visit our Producer section for more information.How do i report a claim to rli? Please contact an RLI claim representative by phone or email to report your damage claim immediately using the following contact information. You may notify us by email or fax using one of the following loss forms to report your loss: