Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 978 [Rate centres in NPA 978] [Dial plan for NPA 978]

NXX: 399

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
978-399 A Westford MA WSFRMADERP0  9102 VERIZON NEW ENGLAND INC. 128      
978-399 0 Westford MA   9102 VERIZON NEW ENGLAND INC. 128      
978-399 1 Westford MA   3370 CTC COMMUNICATIONS CORP. - MA 128   2004-01-31   
978-399 2 Westford MA   9102 VERIZON NEW ENGLAND INC. 128      
978-399 3 Westford MA   6664 SPRINT SPECTRUM, L.P. 128   2005-03-28   
978-399 4 Westford MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2004-03-02   
978-399 5 Westford MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2018-06-22   
978-399 6 Westford MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2019-09-26   
978-399 7 Westford MA   7421 AT&T - LOCAL 128      
978-399 8 Westford MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2004-03-02   
978-399 9 Westford MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2008-11-06   

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

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