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: DVNPIA80XOX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
563-239 9 Dubuque IA 695G IMON COMMUNICATIONS, LLC - IA 634   2018-03-18   
563-261 A Muscatine IA 695G IMON COMMUNICATIONS, LLC - IA 634      
563-261 1 Muscatine IA 695G IMON COMMUNICATIONS, LLC - IA 634   2017-09-30   
563-261 7 Muscatine IA 695G IMON COMMUNICATIONS, LLC - IA 634   2017-09-30   
563-278 4 Clinton IA 695G IMON COMMUNICATIONS, LLC - IA 634   2024-10-06   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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