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: 637

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
713-637 A Houston TX HSTNTXGLRP0  9533 SOUTHWESTERN BELL 560      
713-637 0 Houston TX HSTNTXGLRP0  9533 SOUTHWESTERN BELL 560      
713-637 1 Houston TX HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-637 2 Houston TX HSTNTXGLRP0  9533 SOUTHWESTERN BELL 560      
713-637 3 Houston TX HSTNTXGLRP0  9533 SOUTHWESTERN BELL 560      
713-637 4 Houston TX HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560      
713-637 5 Houston TX HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560      
713-637 6 Houston TX HSTNTXGLRP0  9533 SOUTHWESTERN BELL 560      
713-637 7 Houston TX HSTNTXGLRP0  9533 SOUTHWESTERN BELL 560      
713-637 8 Houston TX HSTNTXGLRP0  9533 SOUTHWESTERN BELL 560      
713-637 9 Houston TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560      

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.