Reference Data Rate Center Directory GRAFTON, IA Rate Center GRAFTON — IA Data last updated: March 10, 2026 LATA 632 State IA Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 43.32926034928307, -93.06909953541823 Area Codes 641 Top Carriers Carrier OCN NXX Count WINNEBAGO COOP. TEL. ASSN. - IA 1337 1
