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: BTVLMD12CMA

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 >>

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-442 0 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-442 1 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-442 2 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-442 3 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-442 4 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-442 5 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-442 6 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-442 7 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-442 8 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-442 9 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-454 9 Washington Zone 4 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2011-12-09   
301-455 A Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-455 0 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-455 1 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-455 2 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-455 3 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-455 4 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-455 5 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-455 6 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-455 7 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-455 8 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-455 9 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-458 9 Washington Zone 4 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-12-13   
301-476 3 Ashton MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2016-02-06   
301-500 4 Washington Zone 2 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2010-11-01   
301-500 5 Washington Zone 2 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2010-11-01   
301-500 6 Washington Zone 2 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2010-11-01   
301-500 7 Washington Zone 2 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2010-11-01   
301-500 9 Washington Zone 2 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2010-11-01   
301-513 2 Washington Zone 13 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2025-06-01   
301-513 4 Washington Zone 13 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2025-06-01   
301-523 A Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-523 0 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-523 1 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-523 2 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-523 3 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-523 4 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-523 5 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-523 6 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-523 7 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-523 8 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-523 9 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-531 0 Washington Zone 4 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2012-03-25   
301-536 A Leonardtown MD 5562 METROPCS, INC. 236      
301-536 0 Leonardtown MD 5562 METROPCS, INC. 236      
301-536 1 Leonardtown MD 5562 METROPCS, INC. 236      
301-536 2 Leonardtown MD 5562 METROPCS, INC. 236      
301-536 3 Leonardtown MD 5562 METROPCS, INC. 236      
301-536 4 Leonardtown MD 5562 METROPCS, INC. 236      
301-536 5 Leonardtown MD 5562 METROPCS, INC. 236      
301-536 6 Leonardtown MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-536 7 Leonardtown MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-536 8 Leonardtown MD 5562 METROPCS, INC. 236      
301-537 A Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-537 0 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-537 1 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-537 2 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-537 3 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-537 4 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-537 5 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-537 6 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-537 7 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-537 8 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-537 9 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-541 4 Washington Zone 5 MD 5562 METROPCS, INC. 236   2013-06-16   
301-541 6 Washington Zone 5 MD 5562 METROPCS, INC. 236   2013-06-16   
301-541 9 Washington Zone 5 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2013-10-11   
301-547 5 Washington Zone 2 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-01-11   
301-547 9 Washington Zone 2 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-02-08   
301-549 0 Ashton MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-09-04   
301-549 2 Ashton MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2017-12-06   
301-549 4 Ashton MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2018-02-05   
301-549 6 Ashton MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2017-12-06   
301-549 8 Ashton MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-09-04   
301-549 9 Ashton MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-09-04   
301-550 3 Washington Zone 10 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2022-10-17   
301-550 4 Washington Zone 10 MD 5562 METROPCS, INC. 236   2022-11-14   
301-556 3 Gaithersburg MD 5562 METROPCS, INC. 236   2004-11-18   
301-556 6 Gaithersburg MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2004-02-28   
301-556 7 Gaithersburg MD 5562 METROPCS, INC. 236   2004-02-28   
301-556 8 Gaithersburg MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2005-11-13   
301-558 A Washington Zone 13 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2025-08-28   
301-558 7 Washington Zone 13 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2025-09-25   
301-558 9 Washington Zone 13 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2025-08-28   
301-583 6 Washington Zone 4 MD 5562 METROPCS, INC. 236   2013-06-03   
301-586 2 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-11-21   
301-586 5 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-11-21   
301-586 7 Washington Zone 3 MD 5562 METROPCS, INC. 236   2007-11-21   
301-590 5 Washington Zone 10 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-09-16   
301-592 7 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2003-07-29   
301-605 0 Washington Zone 10 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2014-09-25   
301-605 2 Washington Zone 10 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-06-16   
301-605 3 Washington Zone 10 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-06-16   
301-605 4 Washington Zone 10 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-02-16   
301-605 5 Washington Zone 10 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-03-25   
301-613 A Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-613 0 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-613 1 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-613 2 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-613 3 Washington Zone 3 MD 6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 >>

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.