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: 506

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-506 A Dorchester MA   829J PAETEC ITEL, LLC 128      
617-506 0 Dorchester MA   318J COMCAST IP PHONE, LLC 128   2006-02-17   
617-506 1 Dorchester MA   318J COMCAST IP PHONE, LLC 128   2006-02-17   
617-506 2 Dorchester MA   829J PAETEC ITEL, LLC 128   2004-06-25   
617-506 3 Dorchester MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2010-09-10   
617-506 4 Dorchester MA   9102 VERIZON NEW ENGLAND INC. 128   2004-06-25   
617-506 5 Dorchester MA   829J PAETEC ITEL, LLC 128   2005-11-20   
617-506 6 Dorchester MA   829J PAETEC ITEL, LLC 128      
617-506 7 Dorchester MA   318J COMCAST IP PHONE, LLC 128   2009-03-22   
617-506 8 Dorchester MA   318J COMCAST IP PHONE, LLC 128   2007-10-12   
617-506 9 Dorchester MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2008-12-06   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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