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.

Dallas, 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 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
972-616 3 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2010-08-26   
972-616 4 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2011-05-22   
972-616 5 DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-616 6 DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-616 7 DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-616 8 DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-616 9 DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
972-619 A DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-619 0 DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-619 1 DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-619 2 DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-619 3 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2011-05-22   
972-619 4 DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-619 5 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2011-05-22   
972-619 6 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2011-04-26   
972-619 7 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2011-04-26   
972-619 8 DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-619 9 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2011-05-22   
972-620 A DLLSTXFBDS0  9533 SOUTHWESTERN BELL 552      
972-628 A DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-628 0 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2010-08-26   
972-628 1 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-628 2 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-628 3 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-628 4 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-628 5 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-628 6 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-628 7 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-628 8 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-628 9 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-629 A DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-629 0 DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-629 1 DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-629 2 DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-629 3 DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-629 4 DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-629 5 DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-629 6 DLLSTXJFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2011-07-07   
972-629 7 DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-629 8 DLLBTXPVDS0  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 552      
972-629 9 RCSNTXHVBMD  516C AT&T CORP. 552   2012-01-11   
972-630 A DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-630 0 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2010-08-26   
972-630 1 DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-630 2 DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-630 3 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2010-02-03   
972-630 4 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2010-02-03   
972-630 5 DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-630 6   903C ONVOY, LLC - TX 552   2008-10-09   
972-630 7 DLLSTXNODS0  9533 SOUTHWESTERN BELL 552      
972-630 8 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2010-08-26   
972-630 9 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2010-08-26   
972-638 A DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-638 0 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2012-08-16   
972-638 1 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-638 2 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-638 3 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-638 4 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-638 5 DLLSTXHM0MD  829J PAETEC ITEL, LLC 552   2010-09-20   
972-638 6 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-638 7 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2010-10-28   
972-638 8 DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2011-01-15   
972-638 9 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2012-08-16   
972-643 A DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-643 0 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-643 1 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-643 2 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-643 3 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-643 4 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-643 5 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-643 6 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-643 7 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-643 8 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2012-08-16   
972-643 9 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-644 A DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-656 A DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552      
972-656 0 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2011-07-21   
972-656 1 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2011-07-21   
972-656 2 DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552      
972-656 3 DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552      
972-656 4 DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2010-08-24   
972-656 5 DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2010-08-24   
972-656 6 DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2008-12-18   
972-656 7 DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2008-12-18   
972-656 8 DLLSTXJFDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2008-12-18   
972-656 9 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2012-08-16   
972-661 A DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-663 A DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-663 0 DLLSTXTAXTZ  624H ONVOY SPECTRUM, LLC 552   2021-05-22   
972-663 1 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-663 2 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-663 3 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-663 4 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-663 5 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2011-08-03   
972-663 6 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-663 7 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-663 8 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-663 9 DLLSTXADDS1  9533 SOUTHWESTERN BELL 552      
972-664 A DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      
972-664 0 DLLSTXRNDS0  9533 SOUTHWESTERN BELL 552      

<< 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 >>

Last updated: Sat, 02 May 2026 12:20:53 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.