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: 239

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-239 A Boston MA   7135 TC SYSTEMS, INC. 128      
617-239 0 Boston MA   7135 TC SYSTEMS, INC. 128      
617-239 1 Boston MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2024-09-11   
617-239 2 Boston MA   7135 TC SYSTEMS, INC. 128      
617-239 3 Boston MA   7135 TC SYSTEMS, INC. 128      
617-239 4 Boston MA   7135 TC SYSTEMS, INC. 128      
617-239 5 Boston MA CATNMAAKAMD  6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2020-07-23   
617-239 6 Boston MA   7135 TC SYSTEMS, INC. 128      
617-239 7 Boston MA   7135 TC SYSTEMS, INC. 128      
617-239 8 Boston MA   7135 TC SYSTEMS, INC. 128      

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.