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.

OCN: 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS

<< 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 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
972-513 A Irving TX IRNGTXXDDS0  552      
972-513 0 Irving TX IRNGTXXDDS0  552      
972-513 1 Irving TX IRNGTXXDDS0  552      
972-513 2 Irving TX IRNGTXXDDS0  552      
972-513 9 Irving TX IRNGTXXDDS0  552      
972-514 A Irving EMS TX IRNGTXXDDS0  552      
972-514 0 Irving EMS TX IRNGTXXDDS0  552      
972-516 A Plano TX PLANTXXADS0  552      
972-517 A Plano TX PLANTXXFDS0  552      
972-518 A Irving TX IRNGTXXGDS0  552      
972-519 A Plano TX PLANTXXBDS0  552      
972-527 A Plano TX PLANTXXFDS0  552      
972-530 A Plano TX GRLDTXXCDS0  552      
972-537 A Lewisville TX LWVLTXXCDS0  552      
972-537 0 Lewisville TX LWVLTXXCDS0  552      
972-537 1 Lewisville TX LWVLTXXCDS0  552      
972-537 2 Lewisville TX LWVLTXXCDS0  552      
972-537 3 Lewisville TX LWVLTXXCDS0  552      
972-539 A Lewisville TX LWVLTXXCDS0  552      
972-541 A Irving TX IRNGTXXEDS0  552      
972-550 A Irving TX IRNGTXXGDS0  552      
972-554 A Irving TX IRNGTXXCDS0  552      
972-570 A Irving TX IRNGTXXADS0  552      
972-574 A Dallas Fort Worth Airport EMS TX DFIATXXADS0  552      
972-575 A Plano TX PLANTXXFDS0  552      
972-578 A Plano TX PLANTXXADS0  552      
972-579 A Irving TX IRNGTXXCDS0  552      
972-580 A Irving TX IRNGTXXGDS0  552      
972-582 A Irving TX IRNGTXXGDS0  552      
972-586 A Dallas Fort Worth Airport EMS TX DFIATXXADS0  552      
972-586 0 Dallas Fort Worth Airport EMS TX DFIATXXADS0  552      
972-586 1 Dallas Fort Worth Airport EMS TX DFIATXXADS0  552      
972-586 4 Dallas Fort Worth Airport EMS TX DFIATXXADS0  552      
972-586 5 Dallas Fort Worth Airport EMS TX DFIATXXADS0  552      
972-586 6 Dallas Fort Worth Airport EMS TX DFIATXXADS0  552      
972-594 A Irving TX IRNGTXXADS0  552      
972-594 0 Irving TX IRNGTXXADS0  552      
972-594 1 Irving TX IRNGTXXADS0  552      
972-594 2 Irving TX IRNGTXXADS0  552      
972-594 3 Irving TX IRNGTXXADS0  552      
972-594 4 Irving TX IRNGTXXADS0  552      
972-594 5 Irving TX IRNGTXXADS0  552      
972-594 6 Irving TX IRNGTXXADS0  552      
972-594 7 Irving TX IRNGTXXADS0  552      
972-594 8 Irving TX IRNGTXXADS0  552      
972-596 A Plano TX PLANTXXBDS0  552      
972-599 A Plano TX PLANTXXBDS0  552      
972-604 A Plano TX PLANTXXDDS1  552      
972-605 A Plano TX PLANTXXDDS1  552      
972-607 A Irving TX IRNGTXXADS0  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 >>

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.