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: HRFRCTBC7MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
203-646 2 Branford CT 506J TWILIO INTERNATIONAL, INC. 920   2021-03-28   
203-896 2 Madison CT 506J TWILIO INTERNATIONAL, INC. 920   2021-03-28   
959-510 1 Columbia CT 506J TWILIO INTERNATIONAL, INC. 920   2021-04-19   
959-895 A Hartford CT 506J TWILIO INTERNATIONAL, INC. 920      
959-895 8 Hartford CT 506J TWILIO INTERNATIONAL, INC. 920   2020-12-13   

Last updated: Fri, 28 Jun 2024 03:14:50 UTC

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