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: PITBPADGDS5

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
412-315 A Pittsburgh Zone 1 PA 7421 AT&T - LOCAL 234      
412-631 A Pittsburgh Suburban Zone 15 PA 7421 AT&T - LOCAL 234      
412-776 A Pittsburgh Suburban Zone 15 PA 7421 AT&T - LOCAL 234      
412-992 A Pittsburgh Zone 1 PA 7421 AT&T - LOCAL 234      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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