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: 584

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
978-584 A Billerica MA   829J PAETEC ITEL, LLC 128      
978-584 0 Billerica MA   829J PAETEC ITEL, LLC 128      
978-584 1 Billerica MA   515J IP HORIZON LLC 128   2016-07-01   
978-584 2 Billerica MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2024-09-22   
978-584 3 Billerica MA   318J COMCAST IP PHONE, LLC 128   2015-05-22   
978-584 4 Billerica MA   892D ONVOY, LLC - MA 128   2022-05-22   
978-584 5 Billerica MA   6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2024-09-22   
978-584 6 Billerica MA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2024-11-27   
978-584 7 Billerica MA   892D ONVOY, LLC - MA 128   2016-03-07   
978-584 8 Billerica MA   892D ONVOY, LLC - MA 128   2016-03-07   
978-584 9 Billerica MA   892D ONVOY, LLC - MA 128   2019-02-23   

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

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