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.

Worthing, SD

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
605-372 A LNNXSDXARS1  1652 CLARITY TELECOM, LLC DBA BLUEPEAK 640      
605-506 A SXFLSDPS8MD  490J DISH WIRELESS, LLC 640      
605-506 9 SXFLSDPS8MD  490J DISH WIRELESS, LLC 640   2022-10-02   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.