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: 355

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
351-355 A Amesbury MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128      
351-355 0 Amesbury MA   624H ONVOY SPECTRUM, LLC 128   2022-02-03   
351-355 1 Amesbury MA   892D ONVOY, LLC - MA 128   2021-06-13   
351-355 2 Amesbury MA   892D ONVOY, LLC - MA 128   2021-06-13   
351-355 3 Amesbury MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2023-09-30   
351-355 4 Amesbury MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2021-12-23   
351-355 5 Amesbury MA   624H ONVOY SPECTRUM, LLC 128   2021-05-17   
351-355 6 Amesbury MA   892D ONVOY, LLC - MA 128   2021-05-18   
351-355 7 Amesbury MA   892D ONVOY, LLC - MA 128   2021-05-18   
351-355 8 Amesbury MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2021-12-06   
351-355 9 Amesbury MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2021-09-05   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.