Contact Us Southwestern Illinois Board of REALTORS® First Name* Last Name* PhoneEmail* Message ContactSouthwestern Illinois Board of REALTORS® Mon-Fri 8:30am - 4:30pm general@sibrealtors.com (618) 277-1980 Find Us. Southwestern Illinois Board of Realtors®1124 Hartman LaneSuite 120Shiloh, IL 62221