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.

NPA: 972 [Rate centres in NPA 972] [Dial plan for NPA 972]

NXX: 370

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
972-370 A Frisco EACS TX FRSCTXCODS1  9533 SOUTHWESTERN BELL 552      
972-370 0 Frisco EACS TX FRSCTXCODS1  9533 SOUTHWESTERN BELL 552      
972-370 1 Frisco EACS TX FRSCTXCODS1  9533 SOUTHWESTERN BELL 552      
972-370 2 Frisco EACS TX FRSCTXCODS1  9533 SOUTHWESTERN BELL 552      
972-370 3 Frisco EACS TX DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2013-04-26   
972-370 4 Frisco EACS TX DLLTTX01DMD  6529 T-MOBILE USA, INC. 552   2014-09-01   
972-370 5 Frisco EACS TX DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2013-04-26   
972-370 6 Frisco EACS TX DLLTTX01CMD  5562 METROPCS, INC. 552   2009-03-05   
972-370 7 Frisco EACS TX FRBRTXBLGT9  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2019-02-02   
972-370 8 Frisco EACS TX DLLTTX01CMD  5562 METROPCS, INC. 552   2009-03-05   
972-370 9 Frisco EACS TX FRSCTXCODS1  9533 SOUTHWESTERN BELL 552      

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.