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: PHLAPASL0MD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
835-248 6 Allentown (Lehigh) PA 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 228   2024-11-16   
835-248 7 Allentown (Lehigh) PA 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 228   2024-11-16   
835-248 8 Allentown (Lehigh) PA 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 228   2024-11-16   
835-248 9 Allentown (Lehigh) PA 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 228   2024-11-16   
835-998 A Philadelphia Suburban Zone 30 PA 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 228   2025-02-26   

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Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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