Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 978 [Rate centres in NPA 978] [Dial plan for NPA 978]

NXX: 435

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
978-435 A Billerica MA CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128      
978-435 0 Billerica MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
978-435 1 Billerica MA CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2003-09-29   
978-435 2 Billerica MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
978-435 3 Billerica MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
978-435 4 Billerica MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
978-435 5 Billerica MA CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2011-11-28   
978-435 6 Billerica MA MRBOMAFZDS0  7135 TC SYSTEMS, INC. 128   2013-02-11   
978-435 7 Billerica MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2022-04-28   
978-435 8 Billerica MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128      
978-435 9 Billerica MA   515J IP HORIZON LLC 128   2015-03-22   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.