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: DLLSTXRIXYY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
214-242 A Dallas TX 612K CSC VOICE, LLC 552      
214-304 A Rockwall TX 612K CSC VOICE, LLC 552      
214-305 A Prosper TX 612K CSC VOICE, LLC 552      
214-307 A McKinney TX 612K CSC VOICE, LLC 552      
214-308 A Frisco TX 612K CSC VOICE, LLC 552      
214-506 A Seagoville TX 612K CSC VOICE, LLC 552      
254-469 A Cisco TX 612K CSC VOICE, LLC 552      
430-296 A Bagwell TX 612K CSC VOICE, LLC 552      
469-614 A Terrell TX 612K CSC VOICE, LLC 552      
469-707 A Royse City TX 612K CSC VOICE, LLC 552      
469-720 A Forney TX 612K CSC VOICE, LLC 552      
903-706 A Paris TX 612K CSC VOICE, LLC 552      
903-919 A Sulphur Springs TX 612K CSC VOICE, LLC 552      

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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