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: 781 [Rate centres in NPA 781] [Dial plan for NPA 781]

NXX: 375

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
781-375 A Dedham MA BSTNMACODS0  7135 TC SYSTEMS, INC. 128      
781-375 0 Dedham MA   7135 TC SYSTEMS, INC. 128      
781-375 1 Dedham MA   892D ONVOY, LLC - MA 128   2010-03-15   
781-375 2 Dedham MA   318J COMCAST IP PHONE, LLC 128   2015-03-16   
781-375 3 Dedham MA   829J PAETEC ITEL, LLC 128   2011-02-14   
781-375 4 Dedham MA   316E YMAX COMMUNICATIONS CORP. - MA 128   2009-02-17   
781-375 5 Dedham MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2013-05-17   
781-375 6 Dedham MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2011-07-14   
781-375 7 Dedham MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2011-07-14   
781-375 8 Dedham MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2011-07-14   
781-375 9 Dedham MA   892D ONVOY, LLC - MA 128   2023-07-23   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.