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.

Switch: BSTPMALL5MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
339-214 A Norwell MA 508J CENTURYLINK COMMUNICATIONS, LLC 128      
774-704 A Fall River MA 508J CENTURYLINK COMMUNICATIONS, LLC 128      
857-306 A Boston MA 508J CENTURYLINK COMMUNICATIONS, LLC 128      
857-315 A Boston MA 508J CENTURYLINK COMMUNICATIONS, LLC 128      
857-317 A Boston MA 508J CENTURYLINK COMMUNICATIONS, LLC 128      
978-566 A Lawrence MA 508J CENTURYLINK COMMUNICATIONS, LLC 128      
978-813 A Shirley MA 508J CENTURYLINK COMMUNICATIONS, LLC 128      

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

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