Reference Data Rate Center Directory GRANVILLE, IA Rate Center GRANVILLE — IA Data last updated: March 10, 2026 LATA 630 State IA Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 42.98434211962231, -95.87459791648826 Area Codes 712 Top Carriers Carrier OCN NXX Count NORTHERN IOWA TEL. CO. 1259 1
