Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: IWCYIA707MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
319-488 4 Keystone IA 145J TERRA NOVA TELECOM INC. 635   2026-02-05   
319-505 1 Waterloo IA 145J TERRA NOVA TELECOM INC. 635   2026-06-05   
319-543 0 Solon IA 145J TERRA NOVA TELECOM INC. 635   2026-02-05   
319-591 6 Washington IA 145J TERRA NOVA TELECOM INC. 635   2026-06-08   
319-900 A Cedar Rapids IA 145J TERRA NOVA TELECOM INC. 635      

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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