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.

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
857-204 0 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2002-12-09   
857-204 2 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2003-02-08   
857-204 3 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2003-02-08   
857-204 4 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2003-05-04   
857-204 5 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2003-05-27   
857-204 6 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2003-05-27   
857-204 7 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2003-05-27   
857-204 8 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2003-07-29   
857-204 9 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2002-12-09   
857-206 1 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2013-09-27   
857-206 9 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2011-12-09   
857-207 5 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2007-08-17   
857-207 6 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2007-08-17   
857-207 7 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2007-08-21   
857-207 8 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2007-08-21   
857-207 9 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2007-08-21   
857-209 6 Cambridge MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2009-12-13   
857-210 A Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128      
857-210 0 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2024-09-22   
857-210 1 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2011-05-01   
857-210 8 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2011-06-28   
857-210 9 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2011-06-28   
857-212 A Dorchester MA 5562 METROPCS, INC. 128      
857-212 0 Dorchester MA 5562 METROPCS, INC. 128      
857-212 1 Dorchester MA 5562 METROPCS, INC. 128      
857-212 2 Dorchester MA 5562 METROPCS, INC. 128      
857-212 3 Dorchester MA 5562 METROPCS, INC. 128      
857-212 4 Dorchester MA 5562 METROPCS, INC. 128      
857-212 5 Dorchester MA 5562 METROPCS, INC. 128      
857-212 6 Dorchester MA 5562 METROPCS, INC. 128      
857-212 7 Dorchester MA 5562 METROPCS, INC. 128      
857-212 8 Dorchester MA 5562 METROPCS, INC. 128      
857-212 9 Dorchester MA 5562 METROPCS, INC. 128      
857-214 9 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2013-09-27   
857-217 A Dorchester MA 5562 METROPCS, INC. 128      
857-217 5 Dorchester MA 5562 METROPCS, INC. 128   2011-12-05   
857-217 6 Dorchester MA 5562 METROPCS, INC. 128   2011-12-05   
857-217 7 Dorchester MA 5562 METROPCS, INC. 128   2011-12-05   
857-217 8 Dorchester MA 5562 METROPCS, INC. 128   2011-12-05   
857-218 0 Brookline MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2013-08-09   
857-218 2 Brookline MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2013-08-09   
857-221 A Boston MA 5562 METROPCS, INC. 128      
857-221 0 Boston MA 5562 METROPCS, INC. 128   2005-07-23   
857-221 1 Boston MA 5562 METROPCS, INC. 128   2005-07-23   
857-221 2 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2005-09-15   
857-221 6 Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2024-09-22   
857-221 7 Boston MA 5562 METROPCS, INC. 128   2005-07-16   
857-222 A Boston MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128      
857-225 3 Brookline MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2009-05-22   
857-225 4 Brookline MA 6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2009-05-22   

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Last updated: Sun, 17 May 2026 03:26:51 UTC

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