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: VINNVACB7MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-642 A Washington Zone 10 MD 181J ADVANCED TELECOM SOLUTIONS LLC 236      
240-642 0 Washington Zone 10 MD 181J ADVANCED TELECOM SOLUTIONS LLC 236   2018-09-16   
240-789 A Washington Zone 10 MD 181J ADVANCED TELECOM SOLUTIONS LLC 236   2021-09-24   
240-789 2 Washington Zone 10 MD 181J ADVANCED TELECOM SOLUTIONS LLC 236   2021-09-24   

Last updated: Fri, 13 May 2022 22:16:13 UTC

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