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
281-657 3 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560      
281-657 4 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560      
281-657 5 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2003-06-03   
281-657 6 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2004-12-06   
281-657 7 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2004-12-06   
281-657 8 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560      
281-657 9 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560      
281-658 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-660 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-661 A HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
281-661 0 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2010-01-30   
281-661 1 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2010-06-13   
281-661 2 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2009-05-25   
281-661 3 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560   2009-08-13   
281-661 4 HSTATX750MD  829J PAETEC ITEL, LLC 560   2009-10-20   
281-661 5 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2010-06-21   
281-661 6 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2010-07-16   
281-661 7 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2010-08-02   
281-661 8 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2010-08-02   
281-661 9 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2010-01-30   
281-669 A HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-669 0 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2004-11-05   
281-669 1 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-669 2 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-669 3 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-669 4 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-669 5 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-669 6 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-10-03   
281-669 7 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-10-03   
281-669 8 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-669 9 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-682 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-684 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-685 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-686 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-687 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-702 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-702 0 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-702 1 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-702 2 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-702 3 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-702 4 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-702 5 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-702 6 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2005-04-03   
281-702 7 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-04-01   
281-702 8 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-04-01   
281-702 9 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-04-01   
281-703 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-714 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-714 0 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2007-09-16   
281-714 1 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2007-09-25   
281-714 2 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2007-09-26   
281-714 3 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2007-09-26   
281-714 4 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2007-09-26   
281-714 5 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2007-08-31   
281-714 6 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2007-09-06   
281-714 7 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2007-09-12   
281-714 8 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2007-09-18   
281-714 9 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2007-09-24   
281-718 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-722 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-726 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-726 0 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-726 1 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2002-12-08   
281-726 2 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2002-12-08   
281-726 3 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-726 4 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-726 5 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-726 6 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-726 7 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-726 8 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-726 9 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-727 A HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
281-727 0 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-12-02   
281-727 1 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
281-727 2 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
281-727 3 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
281-727 4 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
281-727 5 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
281-727 6 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2005-06-01   
281-727 7 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
281-727 8 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2005-06-01   
281-727 9 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2005-06-01   
281-728 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-731 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-732 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-733 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-733 0 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-733 1 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-733 2 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2004-08-25   
281-733 3 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2002-12-08   
281-733 4 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2002-12-08   
281-733 5 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-733 6 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-733 7 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-733 8 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-733 9 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-734 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-735 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-740 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      

<< 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: ISP Telecom

Like this site? We accept donations via PayPal.