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: BLTMMDCH06T

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
443-593 4 Elkton MD 071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-23   
443-593 5 Elkton MD 071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-23   
443-999 A Baltimore MD 9212 VERIZON MARYLAND, INC. 238      

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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