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: MRTWINXARS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
765-763 A Morristown IN 0772 FRONTIER NORTH, INC.. - IN 937      
765-763 0 Morristown IN 0772 FRONTIER NORTH, INC.. - IN 937      
765-763 6 Morristown IN 0772 FRONTIER NORTH, INC.. - IN 937      
765-763 7 Morristown IN 0772 FRONTIER NORTH, INC.. - IN 937      
765-763 8 Morristown IN 0772 FRONTIER NORTH, INC.. - IN 937      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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