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
713-226 4 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-226 5 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-226 6 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-226 7 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-226 8 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-226 9 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-227 A HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-228 A HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-228 0 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-228 1 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-228 2 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-228 3 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-228 4 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-228 5 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-228 6 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-228 7 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-228 8 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-228 9 HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-229 A HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-230 A HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-230 0 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-230 1 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-230 2 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-230 3 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-230 4 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-230 5 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-230 6 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-230 7 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-230 8 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
713-230 9 HSTNTXCLDS0  9533 SOUTHWESTERN BELL 560      
713-231 A HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-231 0 HSTNTXYADS5  903C ONVOY, LLC - TX 560      
713-231 1   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 560      
713-231 2 HSTOTX42DS2  7074 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 560      
713-231 3 HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-231 4 HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-231 5 HSTNTXYADS5  903C ONVOY, LLC - TX 560      
713-231 6 HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-231 7 HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-231 8 HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-231 9 HSTNTXGI1MD  004F BANDWIDTH.COM CLEC, LLC - TX 560      
713-232 A HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-232 0 HSTDTXBGBMD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-232 1 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-232 2 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-232 3 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-232 4 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-232 5 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-232 6 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-232 7 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-232 8 HSTNTXNADS0  9533 SOUTHWESTERN BELL 560      
713-232 9 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-233 A HSTNTXHUDS0  9533 SOUTHWESTERN BELL 560      
713-235 A HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-235 0 HSTNTX01G04  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-235 1 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-235 2 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-235 3 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-235 4 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-235 5 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-235 6 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-235 7 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-235 8 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-235 9 HSTNTXNADS1  9533 SOUTHWESTERN BELL 560      
713-236 A HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-237 A HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-238 A HSTNTXCADS0  9533 SOUTHWESTERN BELL 560      
713-239 A HSTQTX02DMD  8489 GLOBAL CROSSING LOCAL SERVICES, INC. - TX 560      
713-239 0 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560      
713-239 1 HSTATX757MD  7982 CAPROCK TELECOMMUNICATIONS CORP. - TX 560      
713-239 2 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560      
713-239 3   903C ONVOY, LLC - TX 560      
713-239 4   903C ONVOY, LLC - TX 560      
713-239 5   903C ONVOY, LLC - TX 560      
713-239 6 HSTQTX02DMD  8489 GLOBAL CROSSING LOCAL SERVICES, INC. - TX 560      
713-239 7 HSTQTX02DMD  8489 GLOBAL CROSSING LOCAL SERVICES, INC. - TX 560      
713-239 8 HSTQTX02DMD  8489 GLOBAL CROSSING LOCAL SERVICES, INC. - TX 560      
713-239 9   903C ONVOY, LLC - TX 560      
713-240 A HSTDTXBG5MD  6701 AERIAL COMMUNICATIONS, INC. 560      
713-241 A HSTOTX46DS0  7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560      
713-242 A HSTNTXMIDS0  9533 SOUTHWESTERN BELL 560      
713-242 0 HSTNTXMIDS0  9533 SOUTHWESTERN BELL 560      
713-242 1 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
713-242 2 HSTNTXHODS0  9533 SOUTHWESTERN BELL 560      
713-242 3 HSTNTXHODS0  9533 SOUTHWESTERN BELL 560      
713-242 4 HSTNTXHODS0  9533 SOUTHWESTERN BELL 560      
713-242 5 HSTNTXMIDS0  9533 SOUTHWESTERN BELL 560      
713-242 6 HSTNTXMIDS0  9533 SOUTHWESTERN BELL 560      
713-242 7 HSTNTXMIDS0  9533 SOUTHWESTERN BELL 560      
713-242 8 HSTNTXMOX7X  318J COMCAST IP PHONE, LLC 560      
713-242 9 HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560      
713-243 A HSTNTXSUDS0  9533 SOUTHWESTERN BELL 560      
713-244 A HSTNTXSUDS1  9533 SOUTHWESTERN BELL 560      
713-244 0 HSTNTXSUDS1  9533 SOUTHWESTERN BELL 560      
713-244 1 HSTNTXSUDS1  9533 SOUTHWESTERN BELL 560      
713-244 2 HSTNTXSUDS1  9533 SOUTHWESTERN BELL 560      
713-244 3 HSTNTXSUDS1  9533 SOUTHWESTERN BELL 560      
713-244 4 HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560      
713-244 5 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 560      
713-244 6 HSTQTX02DS4  6114 LEVEL 3 COMMUNICATIONS, LLC - 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 >>

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.