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: CMBRMABENMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
774-665 A Norton MA 624H ONVOY SPECTRUM, LLC 128   2021-02-19   
857-298 A Cambridge MA 624H ONVOY SPECTRUM, LLC 128      
857-887 A Jamaica Plain MA 624H ONVOY SPECTRUM, LLC 128   2021-02-19   

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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