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.


NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
301-597 A Hancock MD HGTWMDCWDS0  240      
301-635 A Myersville MD HGTWMDCWDS0  240      
301-671 A Hagerstown MD HGTWMDCWDS0  240      
301-673 A Frederick MD HGTWMDCWDS0  240      
301-781 A Frostburg MD HGTWMDCWDS0  240      
301-783 A Cumberland MD HGTWMDCWDS0  240      
301-849 A Oakland MD HGTWMDCWDS0  240      
304-246 A Berkeley Springs WV HGTWMDCWDS0  240      
304-378 A Martinsburg WV HGTWMDCWDS0  240      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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