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: HSTNTXYANMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
346-436 A Langham Creek TX 506J TWILIO INTERNATIONAL, INC. 560      
346-643 A Splendora TX 506J TWILIO INTERNATIONAL, INC. 560      
346-895 A Houston TX 506J TWILIO INTERNATIONAL, INC. 560      
346-895 9 Houston TX 506J TWILIO INTERNATIONAL, INC. 560   2020-10-04   
936-393 A Saratoga TX 506J TWILIO INTERNATIONAL, INC. 560      
936-895 A Hardin TX 506J TWILIO INTERNATIONAL, INC. 560      

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

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