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: CMBRMAMQDS3

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
617-302 A Quincy MA 316E YMAX COMMUNICATIONS CORP. - MA 128      
617-682 A Cambridge MA 316E YMAX COMMUNICATIONS CORP. - MA 128      
857-216 A Newton MA 316E YMAX COMMUNICATIONS CORP. - MA 128      
857-245 A Brookline MA 316E YMAX COMMUNICATIONS CORP. - MA 128      

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

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