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.

Charlestown, MA

<< 1 2 3 4 5

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
857-971 6 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2016-06-08   
857-971 7 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2016-06-08   
857-971 8 BSTPMALLDS3  892D ONVOY, LLC - MA 128   2016-08-05   
857-971 9   515J IP HORIZON LLC 128   2017-07-02   

<< 1 2 3 4 5

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.