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: BTVLMD18GT0

<< 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 >>

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-406 0 Washington Zone 10 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2009-11-14   
240-408 A Washington Zone 10 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-408 0 Washington Zone 10 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2009-12-12   
240-416 A Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-416 0 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-416 1 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-416 2 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-416 3 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-416 4 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-416 5 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-416 6 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-416 7 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-435 8 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2010-09-28   
240-435 9 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2010-09-28   
240-438 3 Washington Zone 3 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-07-11   
240-438 6 Washington Zone 3 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-11-01   
240-438 8 Washington Zone 3 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-09-01   
240-445 0 Washington Zone 2 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-06-01   
240-445 4 Washington Zone 2 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-07-25   
240-445 8 Washington Zone 2 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-06-01   
240-447 A Washington Zone 10 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-448 8 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2022-10-07   
240-449 A Gaithersburg MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-449 0 Gaithersburg MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2003-11-24   
240-449 2 Gaithersburg MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2003-04-23   
240-449 5 Gaithersburg MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2005-03-24   
240-449 6 Gaithersburg MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2005-03-24   
240-449 7 Gaithersburg MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2005-03-24   
240-449 9 Gaithersburg MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-458 1 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-01-11   
240-458 6 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-02-07   
240-458 7 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-02-07   
240-458 8 Waldorf MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-01-11   
240-459 4 Laurel MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2011-05-07   
240-460 A Washington Zone 3 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-461 A Washington Zone 3 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-463 A Washington Zone 3 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-466 A Mechanicsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-466 2 Mechanicsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2013-05-23   
240-470 4 Laurel MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2015-12-23   
240-470 5 Laurel MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2015-12-23   
240-470 6 Laurel MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2015-12-23   
240-472 A Washington Zone 3 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-474 1 Gaithersburg MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2015-07-20   
240-474 2 Gaithersburg MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2015-07-20   
240-474 3 Gaithersburg MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2015-07-20   
240-474 7 Gaithersburg MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2015-10-16   
240-474 8 Gaithersburg MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2016-01-08   
240-475 A Washington Zone 3 MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-477 0 Gaithersburg MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2008-06-09   

<< 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 >>

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.