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: 575

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-575 A Cambridge MA CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-575 0 Cambridge MA   9102 VERIZON NEW ENGLAND INC. 128      
617-575 1 Cambridge MA   9102 VERIZON NEW ENGLAND INC. 128      
617-575 2 Cambridge MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2011-03-24   
617-575 3 Cambridge MA   9102 VERIZON NEW ENGLAND INC. 128      
617-575 4 Cambridge MA   9102 VERIZON NEW ENGLAND INC. 128      
617-575 5 Cambridge MA   9102 VERIZON NEW ENGLAND INC. 128      
617-575 6 Cambridge MA   9102 VERIZON NEW ENGLAND INC. 128      
617-575 7 Cambridge MA   829J PAETEC ITEL, LLC 128   2008-07-30   
617-575 8 Cambridge MA   9102 VERIZON NEW ENGLAND INC. 128      
617-575 9 Cambridge MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2008-12-06   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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