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: WOBNMADW2MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
508-307 A Taunton MA 9748 AMERICAN MESSAGING SERVICES, LLC 128      
508-575 A Taunton MA 174A NEP, LLC 128      
617-280 A Cambridge MA 174A NEP, LLC 128      
617-647 A Cambridge MA 9748 AMERICAN MESSAGING SERVICES, LLC 128      
617-703 A Cambridge MA 9748 AMERICAN MESSAGING SERVICES, LLC 128      
781-212 A Waltham MA 174A NEP, LLC 128      
978-217 A Sudbury MA 174A NEP, LLC 128      
978-366 A Sudbury MA 9748 AMERICAN MESSAGING SERVICES, LLC 128      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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