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: 774 [Rate centres in NPA 774] [Dial plan for NPA 774]

NXX: 397

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
774-397 A Sturbridge MA CMBSMA013MD  428H AIRUS, INC. - MA 128      
774-397 1 Sturbridge MA CMBSMA013MD  428H AIRUS, INC. - MA 128   2019-11-21   
774-397 2 Sturbridge MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2022-02-13   
774-397 3 Sturbridge MA CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2025-05-09   
774-397 4 Sturbridge MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2022-02-13   
774-397 5 Sturbridge MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-04-15   
774-397 6 Sturbridge MA CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2021-06-05   
774-397 7 Sturbridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2020-07-10   
774-397 8 Sturbridge MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2026-11-08   
774-397 9 Sturbridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2020-07-10   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.