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: 214 [Rate centres in NPA 214] [Dial plan for NPA 214]

NXX: 428

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
214-428 A Dallas TX DLLSTXHARPA  9533 SOUTHWESTERN BELL 552      
214-428 0 Dallas TX DLLSTXHARPA  9533 SOUTHWESTERN BELL 552      
214-428 1 Dallas TX DLLSTXHARPA  9533 SOUTHWESTERN BELL 552      
214-428 2 Dallas TX DLLSTXHARPA  9533 SOUTHWESTERN BELL 552      
214-428 3 Dallas TX DLLTTX01DMD  5562 METROPCS, INC. 552   2019-01-24   
214-428 4 Dallas TX DLLSTXHARPA  9533 SOUTHWESTERN BELL 552      
214-428 5 Dallas TX DLLTTX01DMD  5562 METROPCS, INC. 552   2018-01-25   
214-428 6 Dallas TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2020-02-28   
214-428 7 Dallas TX DLLSTXHARPA  9533 SOUTHWESTERN BELL 552      
214-428 8 Dallas TX DLLSTXHARPA  9533 SOUTHWESTERN BELL 552      
214-428 9 Dallas TX DLLTTX01DMD  5562 METROPCS, INC. 552   2019-01-24   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.