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: 440

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
978-440 A Sudbury MA SDBRMABPRP1  9102 VERIZON NEW ENGLAND INC. 128      
978-440 0 Sudbury MA   6387 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 128   2014-06-01   
978-440 1 Sudbury MA   892D ONVOY, LLC - MA 128   2023-06-23   
978-440 2 Sudbury MA   892D ONVOY, LLC - MA 128   2023-06-23   
978-440 3 Sudbury MA   892D ONVOY, LLC - MA 128   2023-06-23   
978-440 4 Sudbury MA   624H ONVOY SPECTRUM, LLC 128   2021-04-15   
978-440 5 Sudbury MA   829J PAETEC ITEL, LLC 128   2011-03-02   
978-440 6 Sudbury MA   892D ONVOY, LLC - MA 128   2023-06-23   
978-440 7 Sudbury MA   9102 VERIZON NEW ENGLAND INC. 128      
978-440 8 Sudbury MA   9102 VERIZON NEW ENGLAND INC. 128      
978-440 9 Sudbury MA   9102 VERIZON NEW ENGLAND INC. 128      

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

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