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: 781 [Rate centres in NPA 781] [Dial plan for NPA 781]

NXX: 521

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
781-521 A Saugus MA   829J PAETEC ITEL, LLC 128      
781-521 0 Saugus MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2002-12-09   
781-521 1 Saugus MA   829J PAETEC ITEL, LLC 128      
781-521 2 Saugus MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2003-10-26   
781-521 3 Saugus MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2005-02-11   
781-521 4 Saugus MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2004-06-04   
781-521 5 Saugus MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2004-06-04   
781-521 6 Saugus MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2006-09-22   
781-521 7 Saugus MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2006-12-04   
781-521 8 Saugus MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2008-01-12   
781-521 9 Saugus MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2002-12-09   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.