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.

Houston, TX

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
713-347 7 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2022-07-02   
713-347 8 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2022-07-02   
713-347 9 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2022-07-02   
713-348 A HSTNTXJADS0  9533 SOUTHWESTERN BELL 560      
713-348 0 HSTNTXJADS0  9533 SOUTHWESTERN BELL 560      
713-348 1 HSTNTXJADS0  9533 SOUTHWESTERN BELL 560      
713-348 2 HSTNTXJADS0  9533 SOUTHWESTERN BELL 560      
713-348 3 HSTNTXJADS0  9533 SOUTHWESTERN BELL 560      
713-348 4 HSTNTXJADS0  9533 SOUTHWESTERN BELL 560      
713-348 5 HSTNTXJADS0  9533 SOUTHWESTERN BELL 560      
713-348 6 HSTNTXJADS0  9533 SOUTHWESTERN BELL 560      
713-348 7 HSTNTXJADS0  9533 SOUTHWESTERN BELL 560      
713-348 8 HSTNTXJADS0  9533 SOUTHWESTERN BELL 560      
713-348 9 HSTNTXGI1MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2010-10-29   
713-349 A HSTNTXMODS0  9533 SOUTHWESTERN BELL 560      
713-349 0 HSTNTXMODS0  9533 SOUTHWESTERN BELL 560      
713-349 1 HSTNTXMODS0  9533 SOUTHWESTERN BELL 560      
713-349 2 HSTNTXMODS0  9533 SOUTHWESTERN BELL 560      
713-349 3 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-10-21   
713-349 4 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-10-21   
713-349 5 HSTNTXMODS0  9533 SOUTHWESTERN BELL 560      
713-349 6 HSTNTXMODS0  9533 SOUTHWESTERN BELL 560      
713-349 7 HSTNTXMODS0  9533 SOUTHWESTERN BELL 560      
713-349 8 HSTNTXMODS0  9533 SOUTHWESTERN BELL 560      
713-349 9 HSTNTXMODS0  9533 SOUTHWESTERN BELL 560      
713-350 A HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-351 A HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-351 0 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-351 1 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-351 2 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-351 3 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-351 4 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-351 5 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-351 6 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-351 7 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-351 8 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-351 9 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-07-28   
713-353 A HSTNTXGIDS0  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 560      
713-354 A HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-354 0 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-354 1 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-354 2 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-354 3 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-354 4 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-354 5 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-354 6 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-354 7 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-354 8 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-354 9 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-08-18   
713-355 A HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-355 0 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2006-12-06   
713-355 1 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-355 2 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-355 3 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-355 4 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2021-09-09   
713-355 5 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-355 6 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-355 7 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2013-09-15   
713-355 8 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-355 9 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2018-10-22   
713-356 A HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-357 A HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-357 0 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-357 1 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-357 2 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-357 3 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-357 4 HSTNTXSXGT0  8833 LOGIX COMMUNICATIONS CORPORATION - TX 560   2005-03-04   
713-357 5 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2005-03-04   
713-357 6 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2005-03-04   
713-357 7 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2005-03-04   
713-357 8 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-01-08   
713-357 9 HSTNTXGI0MD  004F BANDWIDTH.COM CLEC, LLC - TX 560   2005-03-04   
713-358 A HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-359 A HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-359 0 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2007-10-26   
713-359 1 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-359 2 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-359 3 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-359 4 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-359 5 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-359 6 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2007-10-26   
713-359 7 HSTNTXFADS0  9533 SOUTHWESTERN BELL 560      
713-359 8 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2007-10-26   
713-359 9 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2009-10-07   
713-360 A HSTATX750MD  829J PAETEC ITEL, LLC 560   2025-01-23   
713-360 0 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2012-03-24   
713-360 1 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2011-11-25   
713-360 2 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2011-11-25   
713-360 3 HSTATX750MD  829J PAETEC ITEL, LLC 560   2011-12-23   
713-360 4 HSTATX750MD  829J PAETEC ITEL, LLC 560   2011-11-11   
713-360 5 HSTATX750MD  829J PAETEC ITEL, LLC 560   2011-11-11   
713-360 6 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2012-01-05   
713-360 7 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2012-01-05   
713-360 8 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2012-02-28   
713-360 9 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2012-02-28   
713-361 A HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-362 A HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-363 A HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
713-363 0 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-10-21   
713-363 1 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-10-21   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 >>

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.