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: CDRRIADT1MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
319-207 A Morley IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635      
319-216 A Martelle IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635      
319-218 A Olin IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635      
319-306 A Jesup IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635      
319-307 A Dunkerton IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635      
319-309 A Guernsey IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635      
319-314 A Readlyn IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635      
319-502 A Waterloo IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635   2025-01-10   
319-774 A Cedar Rapids IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635      
319-820 A Monticello IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635      
563-217 A Waukon IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635      
563-270 A Center Junction IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635      
563-273 A Onslow IA 9877 LEVEL 3 COMMUNICATIONS, LLC - IA 635      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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