EntityQ4788600· pop 5· linked from 733 articlesarea code 618Sign in to saveTelephone area code for southern IllinoisConnectionsNorth American Numbering PlanEntitytelephone numbering planEntityMount VernonEntityarea code 217EntityIllinoisEntityIndianaEntityMissouriEntityKentuckyEntitygeographic coordinate systemEntityEast St. LouisEntityAltonEntityBellevilleEntityCairoEntityCarbondaleEntityEdwardsvilleEntityGranite CityEntityHarrisburgEntitySalemEntityMarionEntityCentraliaEntityCategories1947 establishments in IllinoisArea codes in IllinoisArea codes in the United States