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-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
806-227 A Sudan TX MLSHTXXADS0  544      
806-257 A Earth TX ERTHTXXARS0  544      
806-272 A Muleshoe TX MLSHTXXADS0  544      
806-285 A Olton TX OLTOTXXARS0  544      
806-986 A Springlake TX SPLKTXXARS0  544      

Last updated: Sun, 29 Nov 2020 13:13:58 UTC

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