Reference Data Rate Center Directory LETTS, IA Rate Center LETTS — IA Data last updated: March 10, 2026 LATA 634 State IA Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 41.32849253279031, -91.23646732170089 Area Codes 319 Top Carriers Carrier OCN NXX Count WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 1
