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.

OCN: 116E WEST TELECOM SERVICES, LLC - MA

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
617-865 7 Boston MA   128   2019-11-22   
857-356 0 Boston MA   128   2019-11-26   
857-356 1 Boston MA   128   2019-11-26   
857-356 2 Boston MA   128   2019-11-26   
857-557 1 Boston MA   128   2019-11-22   
857-770 A Boston MA   128      
857-770 0 Boston MA   128   2015-02-21   
857-770 9 Boston MA   128   2015-02-21   

Last updated: Wed, 05 Feb 2020 02:15:44 UTC

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