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
605-283 A Hosmer SD HSMRSDXARS0  640      
605-284 A Eureka SD EURKSDXARS0  640      
605-426 A Ipswich SD IPSWSDXARS0  640      
605-437 A Herreid SD HRRDSDXADS1  640      
605-439 A Leola SD LEOLSDXARS0  640      
605-577 A Long Lake SD LGLKSDXARS0  640      
605-762 A Glenham SD GLHMSDXARS0  640      
605-889 A Pollock SD PLLCSDXARS0  640      
605-955 A Mound City SD MDCYSDXARS0  640      

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

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