Reference Data SWAN CREEK, IL Rate Center SWAN CREEK — IL Data last updated: March 10, 2026 LATA 977 State IL Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 40.66829151529479, -90.65515819779202 Area Codes 309 Top Carriers Carrier OCN NXX Count MCDONOUGH TEL. COOP. 1047 1
