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: 617 [Rate centres in NPA 617] [Dial plan for NPA 617]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-398 A Charlestown MA CMBRMA01DS4  7421 AT&T LOCAL 128      
617-398 0 Charlestown MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2008-12-06   
617-398 1 Charlestown MA   4084 PAETEC COMMUNICATIONS, INC.- MA 128   2007-06-04   
617-398 2 Charlestown MA   4084 PAETEC COMMUNICATIONS, INC.- MA 128   2007-10-24   
617-398 3 Charlestown MA   316E YMAX COMMUNICATIONS CORP. - MA 128   2008-03-08   
617-398 4 Charlestown MA   892D ONVOY, LLC - MA 128   2016-02-03   
617-398 5 Charlestown MA   966C DSCI, LLC 128   2005-04-10   
617-398 6 Charlestown MA   6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128   2007-02-18   
617-398 7 Charlestown MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2010-02-18   
617-398 8 Charlestown MA   966G LOCAL ACCESS LLC - MA 128   2013-04-08   
617-398 9 Charlestown MA   7421 AT&T LOCAL 128      

Last updated: Tue, 31 Dec 2019 02:37:20 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.