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: 377

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-377 A Boston MA BSTNMABEDS2  9102 VERIZON NEW ENGLAND INC. 128      
617-377 0 Boston MA   5562 METROPCS, INC. 128   2020-09-03   
617-377 1 Boston MA   9102 VERIZON NEW ENGLAND INC. 128      
617-377 2 Boston MA   9102 VERIZON NEW ENGLAND INC. 128      
617-377 3 Boston MA   9102 VERIZON NEW ENGLAND INC. 128      
617-377 4 Boston MA   318J COMCAST IP PHONE, LLC 128   2016-12-31   
617-377 5 Boston MA   5562 METROPCS, INC. 128   2020-09-03   
617-377 6 Boston MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2017-01-13   
617-377 7 Boston MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2017-01-13   
617-377 8 Boston MA   9102 VERIZON NEW ENGLAND INC. 128      
617-377 9 Boston MA   9102 VERIZON NEW ENGLAND INC. 128      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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