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: HRBGPAHAXFX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
223-305 A Delta PA 732J NUSO, LLC 226      
223-305 1 Delta PA 732J NUSO, LLC 226   2022-12-08   
223-370 0 York PA 732J NUSO, LLC 226   2025-01-31   
223-370 1 York PA 732J NUSO, LLC 226   2025-01-31   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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