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: PIVLMDPKXFX

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
443-947 A Perryville MD 829J PAETEC ITEL, LLC 238   2025-04-01   
443-947 1 Perryville MD 829J PAETEC ITEL, LLC 238      
443-948 7 Baltimore MD 829J PAETEC ITEL, LLC 238   2014-03-10   
443-968 3 Prince Frederick MD 829J PAETEC ITEL, LLC 238   2006-07-30   
667-224 6 Baltimore MD 829J PAETEC ITEL, LLC 238   2015-06-29   
667-224 7 Baltimore MD 829J PAETEC ITEL, LLC 238   2015-06-29   

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Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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