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.

NPA: 351 [Rate centres in NPA 351] [Dial plan for NPA 351]

NXX: 251

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
351-251 A Groton MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
351-251 0 Groton MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-11-27   
351-251 1 Groton MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-06-13   
351-251 2 Groton MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-06-13   
351-251 3 Groton MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-07-10   
351-251 4 Groton MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-07-10   
351-251 5 Groton MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-06-03   
351-251 6 Groton MA SOVLMAABDMD  490J DISH WIRELESS, LLC 128   2023-12-01   
351-251 8 Groton MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-11-27   
351-251 9 Groton MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2024-03-07   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.