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: BSTPMALLPS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
617-207 A Winthrop MA 6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128      
617-466 A Chelsea MA 6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128      
617-764 A Somerville MA 6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128      
617-945 A Cambridge MA 6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128      
857-449 A Boston MA 6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128      
857-496 A South Boston MA 6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128   2005-01-20   
857-991 A Boston MA 6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128      
978-510 A West Newbury MA 6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128      

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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