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
281-418 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-433 A HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-434 A HSTNTXMOIMD  9748 AMERICAN MESSAGING SERVICES, LLC 560      
281-435 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-439 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-450 A HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-451 A HSTDTXBGBMD  5562 METROPCS, INC. 560      
281-451 0 HSTDTXBGBMD  5562 METROPCS, INC. 560      
281-451 1 HSTDTXBGBMD  5562 METROPCS, INC. 560      
281-451 2 HSTDTXBGBMD  5562 METROPCS, INC. 560      
281-451 3 HSTDTXBGBMD  5562 METROPCS, INC. 560      
281-451 4 HSTDTXBGBMD  5562 METROPCS, INC. 560      
281-451 5 HSTDTXBGBMD  5562 METROPCS, INC. 560      
281-451 6 HSTDTXBGBMD  5562 METROPCS, INC. 560      
281-451 7 HSTDTXBGBMD  5562 METROPCS, INC. 560      
281-451 8 HSTDTXBGBMD  5562 METROPCS, INC. 560      
281-451 9 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
281-455 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-460 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-467 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-468 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-472 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-501 A HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560      
281-501 0 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2007-02-14   
281-501 1 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2007-02-14   
281-501 2 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2007-02-14   
281-501 3 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2007-02-14   
281-501 4 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2007-07-31   
281-501 5 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560   2007-07-31   
281-501 6 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2007-08-10   
281-501 7 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2007-08-10   
281-501 8 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2007-10-15   
281-501 9 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560   2007-08-26   
281-507 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-510 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-513 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-520 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-520 0 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2006-05-19   
281-520 1 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2006-05-19   
281-520 2 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2006-05-19   
281-520 3 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2006-07-22   
281-520 4 HSTQTX02XMD  8489 GLOBAL CROSSING LOCAL SERVICES, INC. - TX 560   2006-07-22   
281-520 5 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2006-08-30   
281-520 6 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2006-08-30   
281-520 7 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2006-08-30   
281-520 8 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2006-08-30   
281-520 9 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2006-08-30   
281-527 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-536 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-543 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-546 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-567 A HSTNTXMOIMD  9748 AMERICAN MESSAGING SERVICES, LLC 560      
281-604 A HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
281-605 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-605 0 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2007-07-01   
281-605 1 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560   2006-09-22   
281-605 2 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560   2006-09-19   
281-605 3 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560   2006-09-19   
281-605 4 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560   2006-09-19   
281-605 5 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560   2006-09-22   
281-605 6 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560   2006-09-22   
281-605 7 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560   2006-09-22   
281-605 8 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2006-09-17   
281-605 9 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2006-09-17   
281-610 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-613 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-615 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-620 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-621 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-625 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-627 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-629 A SGLDTXAQ0MD  6630 USA MOBILITY WIRELESS, INC. 560      
281-630 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
281-635 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-635 0 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-635 1 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-635 2 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-635 3 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-635 4 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-635 5 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-635 6 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-635 7 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-635 8 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2003-06-03   
281-635 9 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-636 A HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
281-652 A HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-652 0 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-652 1 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-652 2 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-652 3 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-652 4 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-652 5 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560   2002-12-15   
281-652 6 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2003-06-03   
281-652 7 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-10-08   
281-652 8 HSTNTXYADS5  903C ONVOY, LLC - TX 560   2009-02-11   
281-652 9 HSTNTXMCDS0  9533 SOUTHWESTERN BELL 560      
281-657 A HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560      
281-657 0 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560      
281-657 1 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560      
281-657 2 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 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: VoIP.ms

Like this site? We accept donations via PayPal.