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: 4536 XO MASSACHUSETTS, INC.

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
857-288 A Boston MA BSTPMALLDS1  128      
857-288 2 Boston MA BSTPMALLDS1  128   2009-10-25   
857-288 3 Boston MA BSTPMALLDS1  128   2009-10-25   
857-288 4 Boston MA BSTPMALLDS1  128   2009-10-25   
857-288 5 Boston MA BSTPMALLDS1  128   2006-11-10   
857-288 6 Boston MA CMBRMAMQDS0  128   2006-11-10   
857-288 7 Boston MA CMBRMAMQDS0  128   2006-11-10   
857-300 2 Boston MA CMBRMAMQDS0  128   2011-11-16   
857-313 7 Boston MA BSTPMALLDS1  128   2014-02-11   
857-318 A Boston MA CMBRMAMQDS0  128      
857-318 0 Boston MA CMBRMAMQDS0  128   2007-12-10   
857-321 4 Boston MA BSTPMALLDS1  128   2011-06-09   
857-321 5 Boston MA BSTPMALLDS1  128   2011-06-09   
857-321 6 Boston MA BSTPMALLDS1  128   2011-06-09   
857-345 6 Hyde Park MA BSTPMALLDS1  128   2007-08-02   
857-350 1 Boston MA BSTPMALLDS1  128   2007-09-07   
857-350 8 Boston MA CMBRMAMQDS0  128   2007-12-07   
857-350 9 Boston MA BSTPMALLDS1  128   2007-12-07   
857-366 8 Boston MA BSTPMALLDS1  128   2007-06-08   
857-366 9 Boston MA BSTPMALLDS1  128   2007-06-08   
857-413 4 Boston MA CMBRMAMQDS0  128   2006-01-07   
857-413 5 Boston MA CMBRMAMQDS0  128   2006-01-07   
857-472 5 Boston MA CMBRMAMQDS0  128   2005-04-24   
857-472 6 Boston MA CMBRMAMQDS0  128   2005-04-24   
857-472 7 Boston MA CMBRMAMQDS0  128   2005-04-24   
857-500 4 Cambridge MA BSTPMALLDS1  128   2011-11-29   
857-500 6 Cambridge MA BSTPMALLDS1  128   2011-11-29   
857-524 A South Boston MA CMBRMAMQDS0  128      
857-524 0 South Boston MA CMBRMAMQDS0  128      
857-524 5 South Boston MA CMBRMAMQDS0  128      
857-559 A Brighton MA CMBRMAMQDS0  128      
857-559 0 Brighton MA CMBRMAMQDS0  128      
857-559 5 Brighton MA CMBRMAMQDS0  128      
857-559 6 Brighton MA CMBRMAMQDS0  128      
857-559 7 Brighton MA CMBRMAMQDS0  128      
857-559 8 Brighton MA CMBRMAMQDS0  128      
857-588 A Charlestown MA CMBRMAMQDS0  128      
857-588 0 Charlestown MA CMBRMAMQDS0  128      
857-588 5 Charlestown MA CMBRMAMQDS0  128      
857-588 6 Charlestown MA CMBRMAMQDS0  128      
857-588 7 Charlestown MA CMBRMAMQDS0  128      
857-588 8 Charlestown MA CMBRMAMQDS0  128      
857-588 9 Charlestown MA CMBRMAMQDS0  128      
857-598 A Milton MA CMBRMAMQDS0  128      
857-598 0 Milton MA CMBRMAMQDS0  128      
857-598 1 Milton MA CMBRMAMQDS0  128      
857-598 3 Milton MA CMBRMAMQDS0  128      
857-600 3 Cambridge MA BSTPMALLDS1  128   2011-06-07   
857-600 4 Cambridge MA BSTPMALLDS1  128   2011-06-07   
857-728 A Jamaica Plain MA CMBRMAMQDS0  128      

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Last updated: Tue, 04 May 2021 15:04:27 UTC

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