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: 539

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-539 A Winthrop MA WNTHMAMARP0  9102 VERIZON NEW ENGLAND INC. 128      
617-539 0 Winthrop MA   9102 VERIZON NEW ENGLAND INC. 128      
617-539 1 Winthrop MA   9102 VERIZON NEW ENGLAND INC. 128      
617-539 2 Winthrop MA   892D ONVOY, LLC - MA 128   2016-03-03   
617-539 3 Winthrop MA   9102 VERIZON NEW ENGLAND INC. 128      
617-539 4 Winthrop MA   145J TERRA NOVA TELECOM INC. 128   2022-05-05   
617-539 5 Winthrop MA   145J TERRA NOVA TELECOM INC. 128   2024-02-10   
617-539 6 Winthrop MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2011-01-02   
617-539 7 Winthrop MA   892D ONVOY, LLC - MA 128   2016-03-03   
617-539 8 Winthrop MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2011-09-01   
617-539 9 Winthrop MA   9102 VERIZON NEW ENGLAND INC. 128      

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

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