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: BSTNMACODS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
617-217 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-316 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-385 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-392 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-476 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-487 A Brookline MA 7135 TC SYSTEMS, INC. 128      
617-488 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-563 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-598 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-646 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-672 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-692 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-747 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-824 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-850 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-880 A Boston MA 7135 TC SYSTEMS, INC. 128      
617-912 A Boston MA 7135 TC SYSTEMS, INC. 128      
781-375 A Dedham MA 7135 TC SYSTEMS, INC. 128      
857-338 A Boston MA 7135 TC SYSTEMS, INC. 128      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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