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: 617 [Rate centres in NPA 617] [Dial plan for NPA 617]

NXX: 622

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-622 A South Boston MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
617-622 0 South Boston MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
617-622 1 South Boston MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
617-622 2 South Boston MA   892D ONVOY, LLC - MA 128      
617-622 3 South Boston MA   624H ONVOY SPECTRUM, LLC 128   2024-12-06   
617-622 4 South Boston MA   624H ONVOY SPECTRUM, LLC 128   2024-12-06   
617-622 5 South Boston MA   892D ONVOY, LLC - MA 128   2010-04-07   
617-622 6 South Boston MA   624H ONVOY SPECTRUM, LLC 128   2024-12-06   
617-622 7 South Boston MA   892D ONVOY, LLC - MA 128      
617-622 8 South Boston MA   892D ONVOY, LLC - MA 128      
617-622 9 South Boston MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.