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 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
713-456 5 HSTNTXPRDS0  9533 SOUTHWESTERN BELL 560      
713-456 6 HSTNTXPRDS0  9533 SOUTHWESTERN BELL 560      
713-456 7 HSTWTXUFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560      
713-456 8 HSTNTXPRDS0  9533 SOUTHWESTERN BELL 560      
713-456 9 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-457 A HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-458 A HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-458 0 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-458 1 HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-458 2 HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-458 3 HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-458 4 HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-458 5 HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-458 6 HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-458 7 HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-458 8 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-458 9 HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-459 A HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-460 A HSTNTXFADS0  9533 SOUTHWESTERN BELL 560      
713-461 A HSTNTXHODS0  9533 SOUTHWESTERN BELL 560      
713-462 A HSTNTXFADS0  9533 SOUTHWESTERN BELL 560      
713-463 A HSTNTXHODS0  9533 SOUTHWESTERN BELL 560      
713-464 A HSTNTXHODS0  9533 SOUTHWESTERN BELL 560      
713-465 A HSTNTXHODS0  9533 SOUTHWESTERN BELL 560      
713-467 A HSTNTXHODS0  9533 SOUTHWESTERN BELL 560      
713-468 A HSTNTXHODS0  9533 SOUTHWESTERN BELL 560      
713-469 A HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-469 0 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
713-469 1 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
713-469 2 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
713-469 3 HSTQTX02DMD  8489 GLOBAL CROSSING LOCAL SERVICES, INC. - TX 560      
713-469 4 HSTATX757MD  7982 CAPROCK TELECOMMUNICATIONS CORP. - TX 560      
713-469 5   903C ONVOY, LLC - TX 560      
713-469 6 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-469 7 HSTNTXFADS0  9533 SOUTHWESTERN BELL 560      
713-469 8 HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-469 9   903C ONVOY, LLC - TX 560      
713-470 A HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-470 0 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-470 1 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-470 2 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-470 3 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-470 4 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-470 5 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-470 6 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-470 7 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-470 8 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-470 9 HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-471 A HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-472 A HSTNTXGRDS0  9533 SOUTHWESTERN BELL 560      
713-472 0 HSTNTXGRDS0  9533 SOUTHWESTERN BELL 560      
713-472 1 HSTNTXGRDS0  9533 SOUTHWESTERN BELL 560      
713-472 2 HSTNTXGRDS0  9533 SOUTHWESTERN BELL 560      
713-472 3 HSTNTXGRDS0  9533 SOUTHWESTERN BELL 560      
713-472 4 HSTNTXGRDS0  9533 SOUTHWESTERN BELL 560      
713-472 5 HSTNTXGRDS0  9533 SOUTHWESTERN BELL 560      
713-472 6 HSTNTXGRDS0  9533 SOUTHWESTERN BELL 560      
713-472 7 HSTNTXGRDS0  9533 SOUTHWESTERN BELL 560      
713-472 8 HSTNTXGRDS0  9533 SOUTHWESTERN BELL 560      
713-472 9 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-473 A HSTNTXGRDS0  9533 SOUTHWESTERN BELL 560      
713-475 A HSTNTXGRDS0  9533 SOUTHWESTERN BELL 560      
713-476 A HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560      
713-476 0 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560      
713-476 1 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-476 2 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-476 3 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560      
713-476 4 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560      
713-476 5 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560      
713-476 6 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560      
713-476 7 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560      
713-476 8 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-476 9 HSTNTXOVDS0  9533 SOUTHWESTERN BELL 560      
713-477 A HSTNTXGRDS0  9533 SOUTHWESTERN BELL 560      
713-478 A HSTDTXBG5MD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-479 A HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-480 A HSTDTXBG5MD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-481 A HSTQTX02DMD  8489 GLOBAL CROSSING LOCAL SERVICES, INC. - TX 560      
713-481 0   8489 GLOBAL CROSSING LOCAL SERVICES, INC. - TX 560      
713-481 1   8489 GLOBAL CROSSING LOCAL SERVICES, INC. - TX 560      
713-481 2   8489 GLOBAL CROSSING LOCAL SERVICES, INC. - TX 560      
713-481 3   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
713-481 4   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
713-481 5   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
713-481 6   8489 GLOBAL CROSSING LOCAL SERVICES, INC. - TX 560      
713-481 7   6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
713-481 8   8489 GLOBAL CROSSING LOCAL SERVICES, INC. - TX 560      
713-481 9   8489 GLOBAL CROSSING LOCAL SERVICES, INC. - TX 560      
713-483 A HSTNTXCLDS1  9533 SOUTHWESTERN BELL 560      
713-483 0 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-483 1 HSTNTXCLDS1  9533 SOUTHWESTERN BELL 560      
713-483 2 HSTNTXCLDS1  9533 SOUTHWESTERN BELL 560      
713-483 3 HSTNTXCLDS1  9533 SOUTHWESTERN BELL 560      
713-483 4 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-483 5 HSTNTXCLDS1  9533 SOUTHWESTERN BELL 560      
713-483 6 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-483 7 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-483 8 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-483 9 HSTNTXCLDS1  9533 SOUTHWESTERN BELL 560      
713-484 A HSTNTXPRDS0  9533 SOUTHWESTERN BELL 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 >>

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.