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.

NPA: 713 [Rate centres in NPA 713] [Dial plan for NPA 713]

NXX: 978

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
713-978 A Houston TX HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-978 0 Houston TX HSTNTXMOX6X  624H ONVOY SPECTRUM, LLC 560      
713-978 1 Houston TX HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-978 2 Houston TX HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-978 3 Houston TX HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-978 4 Houston TX HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-978 5 Houston TX HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-978 6 Houston TX HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-978 7 Houston TX HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-978 8 Houston TX HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-978 9 Houston TX HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.