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.

Switch: PNBLARJEY0X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
870-288 3 El Dorado AR 425J CSC WIRELESS, LLC 530   2025-04-14   
870-288 4 El Dorado AR 425J CSC WIRELESS, LLC 530   2025-04-14   
870-440 9 El Dorado AR 425J CSC WIRELESS, LLC 530   2026-06-12   
870-713 A El Dorado AR 425J CSC WIRELESS, LLC 530      
870-713 0 El Dorado AR 425J CSC WIRELESS, LLC 530   2019-07-13   
870-713 2 El Dorado AR 425J CSC WIRELESS, LLC 530   2019-05-24   
870-713 8 El Dorado AR 425J CSC WIRELESS, LLC 530   2025-04-14   
870-713 9 El Dorado AR 425J CSC WIRELESS, LLC 530   2026-06-11   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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