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: 399

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
774-399 A Westboro MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
774-399 0 Westboro MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2019-07-12   
774-399 1 Westboro MA   073H TELNYX LLC 128   2022-06-16   
774-399 2 Westboro MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2020-01-15   
774-399 3 Westboro MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2020-04-13   
774-399 5 Westboro MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2019-07-13   
774-399 6 Westboro MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-03-07   
774-399 7 Westboro MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-03-07   
774-399 8 Westboro MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-03-07   
774-399 9 Westboro MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2019-09-08   

Last updated: Thu, 04 Aug 2022 23:14:42 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.