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: CLEVOHBBCM0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
440-370 1 Amherst OH 6534 NEW CINGULAR WIRELESS PCS, LLC - IL 320   2015-09-02   
440-370 2 Amherst OH 6534 NEW CINGULAR WIRELESS PCS, LLC - IL 320   2017-04-09   
440-370 6 Amherst OH 6534 NEW CINGULAR WIRELESS PCS, LLC - IL 320   2018-04-15   
440-999 0 Chagrin Falls OH 6534 NEW CINGULAR WIRELESS PCS, LLC - IL 320   2015-06-25   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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