Reference Data Rate Center Directory BLOCKTON, IA Rate Center BLOCKTON — IA Data last updated: March 10, 2026 LATA 632 State IA Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 40.61536509646199, -94.47355700367699 Area Codes 641 Top Carriers Carrier OCN NXX Count GRAND RIVER MUTUAL TEL CO 1888 1
