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: PHLAPASLTMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
215-485 A Philadelphia Suburban Zone 40 PA 7421 AT&T - LOCAL 228      
215-550 A Newtown PA 7421 AT&T - LOCAL 228      
215-688 A Philadelphia Suburban Zone 41 PA 7421 AT&T - LOCAL 228      
484-807 A Philadelphia Suburban Zone 25 PA 7421 AT&T - LOCAL 228      
610-427 A Pottstown PA 7421 AT&T - LOCAL 228      
610-479 A Philadelphia Suburban Zone 10 PA 7421 AT&T - LOCAL 228      
610-561 A Exton PA 7421 AT&T - LOCAL 228      
610-673 A Philadelphia Suburban Zone 26 PA 7421 AT&T - LOCAL 228      
610-893 A Philadelphia Suburban Zone 28 PA 7421 AT&T - LOCAL 228      

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

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