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: PHLAPASLOMD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
835-287 7 Reading PA 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 228   2026-06-06   
835-287 8 Reading PA 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 228   2026-03-07   
835-287 9 Reading PA 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 228   2026-03-07   
835-835 4 Reading PA 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 228   2025-12-14   

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Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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