Reference Data Rate Center Directory GARRISON, IA Rate Center GARRISON — IA Data last updated: March 10, 2026 LATA 635 State IA Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 42.14361063047033, -92.14219723378457 Area Codes 319 Top Carriers Carrier OCN NXX Count KEYSTONE FARMS COOP. TEL. CO. 1217 1
