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.

OCN: 671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
978-669 5 Gardner MA CHTWMABF2MD  128   2006-09-23   
978-674 6 Lowell MA CHTWMABF2MD  128   2008-03-07   
978-728 5 Leominster MA CHTWMABF2MD  128   2006-10-20   
978-743 5 Pepperell MA CHTWMABF2MD  128   2009-03-16   
978-783 5 Andover MA CHTWMABF2MD  128   2014-07-05   
978-785 5 Lunenburg MA CHTWMABF2MD  128   2006-04-13   
978-788 6 Lowell MA CHTWMABF2MD  128   2011-06-05   
978-856 6 Lowell MA CHTWMABF2MD  128   2011-06-05   
978-883 5 Ashburnham MA CHTWMABF2MD  128   2007-11-16   
978-905 7 Lowell MA CHTWMABF2MD  128   2010-04-17   
978-912 9 Haverhill MA CHTWMABF2MD  128   2006-07-08   
978-949 A Manchester MA CHTWMABF2MD  128      
978-949 5 Manchester MA CHTWMABF2MD  128   2017-05-21   
979-266 6 Clute-Lake Jackson TX HSTNTXPB6MD  560   2012-04-15   
979-358 5 Wharton TX HSTNTXPB6MD  560   2012-04-15   
979-421 7 Brenham TX HSTNTXPB6MD  560   2012-04-15   
979-429 8 Bay City TX HSTNTXPB6MD  560   2014-02-19   
983-224 A Denver CO   656   2026-04-28   
983-224 2 Denver CO   656   2026-04-28   

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Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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