Reference Data Rate Center Directory GRANDRIVER, IA Rate Center GRANDRIVER — IA Data last updated: March 10, 2026 LATA 632 State IA Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 40.81912560233395, -93.96194436882172 Area Codes 641 Top Carriers Carrier OCN NXX Count GRAND RIVER MUTUAL TEL CO 1888 1
