<page_title> Area code 312 </page_title> <section_title> External links </section_title> <table> <cell> area code 312 (overlaid by 872) <col_header> Illinois area codes: 217, 224/847, 309, 312, 331/630, 618, 708, 773, 779/815, 872 </col_header> </cell> </table>
312 has been overlaid by 872.