Reference Data Rate Center Directory SHELLSBURG, IA Rate Center SHELLSBURG — IA Data last updated: March 10, 2026 LATA 635 State IA Area Codes 1 Exchanges (NXX) 2 Carriers 1 Coordinates 42.09497334511044, -91.87167318314945 Area Codes 319 Top Carriers Carrier OCN NXX Count FARMERS MUTUAL TEL. CO. 1173 2
