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: 520

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-520 A Cambridge MA CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-520 0 Cambridge MA CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-520 1 Cambridge MA CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-520 2 Cambridge MA CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-520 3 Cambridge MA CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-520 4 Cambridge MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2011-03-24   
617-520 5 Cambridge MA CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-520 6 Cambridge MA CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-520 7 Cambridge MA CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-520 8 Cambridge MA CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      
617-520 9 Cambridge MA CMBRMAWADS2  9102 VERIZON NEW ENGLAND INC. 128      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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