Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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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
617-440 A Somerville MA WRCSMA05DS0  4052 CONVERSENT COMMUNICATIONS OF MASSACHUSETTS, LLC 128      
617-440 0 Somerville MA   3370 CTC COMMUNICATIONS CORP. - MA 128   2002-10-13   
617-440 1 Somerville MA   4052 CONVERSENT COMMUNICATIONS OF MASSACHUSETTS, LLC 128   2003-02-06   
617-440 3 Somerville MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-09-04   
617-440 4 Somerville MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-09-18   
617-440 5 Somerville MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-04-27   
617-440 6 Somerville MA   4052 CONVERSENT COMMUNICATIONS OF MASSACHUSETTS, LLC 128      
617-440 7 Somerville MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2007-08-15   
617-440 8 Somerville MA   316E YMAX COMMUNICATIONS CORP. - MA 128   2009-11-16   
617-440 9 Somerville MA   073H TELNYX LLC 128   2017-04-24   

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

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