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: PITBPAOKXLX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
878-259 A Export PA 939H COMMIO, LLC 234      
878-275 A Avonmore PA 939H COMMIO, LLC 234      
878-276 A Black Lick PA 939H COMMIO, LLC 234      
878-279 A Dawson PA 939H COMMIO, LLC 234      
878-280 A Fayette City PA 939H COMMIO, LLC 234      
878-670 A Pittsburgh Zone 1 PA 939H COMMIO, LLC 234      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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