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: BLTMMDCH3MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
410-618 A Perryville MD 228C IDT AMERICA, CORP. - MD 238      
410-618 2 Perryville MD 228C IDT AMERICA, CORP. - MD 238   2012-01-06   
443-747 4 Port Deposit MD 228C IDT AMERICA, CORP. - MD 238   2012-01-08   
443-782 8 Annapolis MD 228C IDT AMERICA, CORP. - MD 238   2018-01-14   
443-941 2 Elkton MD 228C IDT AMERICA, CORP. - MD 238   2012-01-08   
443-967 2 North East MD 228C IDT AMERICA, CORP. - MD 238   2012-01-08   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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