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.

OCN: 204A CS TECHNOLOGIES, INC. - IA

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
563-316 A Muscatine IA ELRGIAXO1MD  634      
563-316 5 Muscatine IA ELRGIAXO1MD  634   2013-05-12   
563-345 A Davenport IA ELRGIAXO1MD  634      
563-587 8 Dubuque IA ELRGIAXO1MD  634   2009-12-02   
563-657 1 Walcott IA ELRGIAXO1MD  634   2017-03-12   

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

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