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: PHLBPAPU9MD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
610-339 A Allentown (Lehigh) PA 6630 SPOK, INC. 228      
610-414 A Pottstown PA 6630 SPOK, INC. 228      
610-418 A West Chester PA 6630 SPOK, INC. 228      
610-475 A Philadelphia Suburban Zone 31 PA 6630 SPOK, INC. 228      
610-501 A Philadelphia Suburban Zone 25 PA 6630 SPOK, INC. 228      
610-815 A Collegeville PA 6630 SPOK, INC. 228      
610-830 A Allentown (Lehigh) PA 6630 SPOK, INC. 228      
610-907 A Philadelphia Suburban Zone 31 PA 6630 SPOK, INC. 228      
610-912 A Allentown (Lehigh) PA 6630 SPOK, INC. 228      
610-963 A Philadelphia Suburban Zone 26 PA 6630 SPOK, INC. 228      

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Last updated: Sun, 17 May 2026 03:26:51 UTC

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