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
972-254 A Irving TX IRNGTXXBDS1  552      
972-255 A Irving TX IRNGTXXADS0  552      
972-256 A Irving EMS TX IRNGTXXADS0  552      
972-256 0 Irving EMS TX   552      
972-256 1 Irving EMS TX   552      
972-256 2 Irving EMS TX   552      
972-256 3 Irving EMS TX   552      
972-256 4 Irving EMS TX   552      
972-256 5 Irving EMS TX   552      
972-256 7 Irving EMS TX   552      
972-256 9 Irving EMS TX   552      
972-257 A Irving TX IRNGTXXADS0  552      
972-258 A Irving TX IRNGTXXADS0  552      
972-259 A Irving TX IRNGTXXBDS1  552      
972-259 1 Irving TX   552      
972-259 2 Irving TX   552      
972-259 3 Irving TX   552      
972-259 4 Irving TX   552      
972-259 5 Irving TX   552      
972-259 6 Irving TX   552      
972-259 8 Irving TX   552      
972-259 9 Irving TX   552      
972-261 A Irving EMS TX IRNGTXXADS0  552      
972-261 0 Irving EMS TX   552      
972-261 1 Irving EMS TX   552      
972-261 2 Irving EMS TX   552      
972-261 5 Irving EMS TX   552      
972-271 A Plano TX GRLDTXXBDS0  552      
972-272 A Plano TX GRLDTXXADS0  552      
972-273 A Irving TX IRNGTXXBDS1  552      
972-273 1 Irving TX   552      
972-273 2 Irving TX   552      
972-273 3 Irving TX   552      
972-273 4 Irving TX   552      
972-273 5 Irving TX   552      
972-273 6 Irving TX   552      
972-273 7 Irving TX   552      
972-273 8 Irving TX   552      
972-276 A Plano TX GRLDTXXADS0  552      
972-278 A Plano TX GRLDTXXBDS0  552      
972-281 A Irving TX IRNGTXXEDS0  552      
972-281 0 Irving TX   552      
972-281 1 Irving TX   552      
972-281 2 Irving TX   552      
972-281 3 Irving TX   552      
972-281 4 Irving TX   552      
972-281 5 Irving TX   552      
972-281 6 Irving TX   552      
972-281 8 Irving TX   552      
972-295 A Plano TX WYLITXXADS0  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: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.