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: 947

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
978-947 A Billerica MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-947 0 Billerica MA   145J TERRA NOVA TELECOM INC. 128   2021-09-25   
978-947 1 Billerica MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-947 2 Billerica MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-947 3 Billerica MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-947 4 Billerica MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-947 5 Billerica MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-947 6 Billerica MA   145J TERRA NOVA TELECOM INC. 128   2022-04-08   
978-947 7 Billerica MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-947 8 Billerica MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-947 9 Billerica MA NRTNMAAACM4  5562 METROPCS, INC. 128   2022-11-01   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.