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.

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
319-308 2 Fort Madison IA 506J TWILIO INTERNATIONAL, INC. 634   2020-12-23   
319-380 3 Burlington IA 506J TWILIO INTERNATIONAL, INC. 634   2021-01-26   
319-732 2 Keokuk IA 506J TWILIO INTERNATIONAL, INC. 634   2020-12-23   
563-278 4 Clinton IA 506J TWILIO INTERNATIONAL, INC. 634   2020-12-23   
563-281 7 Muscatine IA 506J TWILIO INTERNATIONAL, INC. 634   2020-12-23   
563-348 9 Dubuque IA 506J TWILIO INTERNATIONAL, INC. 634   2020-12-23   
563-521 5 Maquoketa IA 506J TWILIO INTERNATIONAL, INC. 634   2020-12-23   
563-666 2 Walcott IA 506J TWILIO INTERNATIONAL, INC. 634   2020-12-23   
563-895 A Davenport IA 506J TWILIO INTERNATIONAL, INC. 634      
563-895 8 Davenport IA 506J TWILIO INTERNATIONAL, INC. 634   2020-12-21   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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