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.

Switch: CHTWMABF2MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
617-830 A Boston MA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 128      
781-851 A Malden MA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 128      
857-226 A Newton MA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 128      
857-242 A Cambridge MA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 128      
857-416 A Boston MA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 128      
857-418 A Dorchester MA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 128      
978-605 A Danvers MA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 128      
978-949 A Manchester MA 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 128      

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

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