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: HSTNTXCLDS1

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
713-210 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-210 0 Houston TX 9533 SOUTHWESTERN BELL 560      
713-210 1 Houston TX 9533 SOUTHWESTERN BELL 560      
713-210 2 Houston TX 9533 SOUTHWESTERN BELL 560      
713-210 3 Houston TX 9533 SOUTHWESTERN BELL 560      
713-210 4 Houston TX 9533 SOUTHWESTERN BELL 560      
713-210 5 Houston TX 9533 SOUTHWESTERN BELL 560      
713-210 6 Houston TX 9533 SOUTHWESTERN BELL 560      
713-210 7 Houston TX 9533 SOUTHWESTERN BELL 560      
713-210 8 Houston TX 9533 SOUTHWESTERN BELL 560      
713-276 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-286 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-308 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-372 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-372 0 Houston TX 9533 SOUTHWESTERN BELL 560   2007-04-26   
713-372 1 Houston TX 9533 SOUTHWESTERN BELL 560   2007-04-26   
713-372 2 Houston TX 9533 SOUTHWESTERN BELL 560   2007-04-26   
713-372 3 Houston TX 9533 SOUTHWESTERN BELL 560   2007-04-26   
713-372 4 Houston TX 9533 SOUTHWESTERN BELL 560   2007-04-26   
713-372 5 Houston TX 9533 SOUTHWESTERN BELL 560   2007-04-26   
713-372 6 Houston TX 9533 SOUTHWESTERN BELL 560   2007-04-26   
713-372 7 Houston TX 9533 SOUTHWESTERN BELL 560   2007-04-26   
713-372 8 Houston TX 9533 SOUTHWESTERN BELL 560   2007-04-26   
713-372 9 Houston TX 9533 SOUTHWESTERN BELL 560   2007-04-26   
713-374 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-374 0 Houston TX 9533 SOUTHWESTERN BELL 560      
713-374 1 Houston TX 9533 SOUTHWESTERN BELL 560      
713-374 2 Houston TX 9533 SOUTHWESTERN BELL 560      
713-374 3 Houston TX 9533 SOUTHWESTERN BELL 560      
713-374 4 Houston TX 9533 SOUTHWESTERN BELL 560      
713-374 6 Houston TX 9533 SOUTHWESTERN BELL 560      
713-374 7 Houston TX 9533 SOUTHWESTERN BELL 560      
713-374 8 Houston TX 9533 SOUTHWESTERN BELL 560      
713-374 9 Houston TX 9533 SOUTHWESTERN BELL 560      
713-381 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-381 0 Houston TX 9533 SOUTHWESTERN BELL 560   2006-03-31   
713-381 1 Houston TX 9533 SOUTHWESTERN BELL 560   2006-03-31   
713-381 2 Houston TX 9533 SOUTHWESTERN BELL 560   2006-03-31   
713-381 3 Houston TX 9533 SOUTHWESTERN BELL 560   2006-03-31   
713-381 4 Houston TX 9533 SOUTHWESTERN BELL 560   2006-03-31   
713-381 5 Houston TX 9533 SOUTHWESTERN BELL 560   2006-03-31   
713-381 6 Houston TX 9533 SOUTHWESTERN BELL 560   2006-03-31   
713-381 7 Houston TX 9533 SOUTHWESTERN BELL 560   2006-03-31   
713-381 8 Houston TX 9533 SOUTHWESTERN BELL 560   2006-03-31   
713-381 9 Houston TX 9533 SOUTHWESTERN BELL 560   2006-03-31   
713-405 A Houston TX 9533 SOUTHWESTERN BELL 560      
713-405 4 Houston TX 9533 SOUTHWESTERN BELL 560      
713-405 5 Houston TX 9533 SOUTHWESTERN BELL 560      
713-405 6 Houston TX 9533 SOUTHWESTERN BELL 560      
713-405 8 Houston TX 9533 SOUTHWESTERN BELL 560      

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Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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