Reference Data Rate Center Directory GRANT, IA Rate Center GRANT — IA Data last updated: March 10, 2026 LATA 644 State IA Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 41.1431865224811, -94.98411375712995 Area Codes 712 Top Carriers Carrier OCN NXX Count GRISWOLD COOP. TEL. CO. 1195 1
