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.
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Newalla, OK

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
405-391 A NWLLOKXADS0  2006 MCLOUD TEL. CO. 536      
405-718 A OKCZOKZCFMD  5257 LEVEL 3 COMMUNICATIONS, LLC - OK 536      
405-718 2 OKCZOKZCFMD  5257 LEVEL 3 COMMUNICATIONS, LLC - OK 536   2017-10-13   

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

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