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: RDNGPAREUMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
484-258 7 Reading PA 7513 CTSI, INC. - PA 228   2010-07-08   
610-370 8 Reading PA 7513 CTSI, INC. - PA 228   2004-04-09   
610-603 2 Reading PA 7513 CTSI, INC. - PA 228   2003-05-07   
610-603 3 Reading PA 7513 CTSI, INC. - PA 228   2004-08-20   
610-603 5 Reading PA 7513 CTSI, INC. - PA 228   2004-08-20   
610-603 7 Reading PA 7513 CTSI, INC. - PA 228   2007-01-19   
610-685 A Reading PA 7513 CTSI, INC. - PA 228      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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