Reference Data Rate Center Directory IRWIN, IA Rate Center IRWIN — IA Data last updated: March 10, 2026 LATA 644 State IA Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 41.79257404936718, -95.20628068477272 Area Codes 712 Top Carriers Carrier OCN NXX Count FARMERS MUTUAL COOP. TEL. CO. 1168 1
