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: CLMAMDORGT0

<< 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 >>

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
443-635 3 Baltimore MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-12-13   
443-635 4 Baltimore MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-12-13   
443-635 5 Baltimore MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-12-13   
443-635 6 Baltimore MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-12-13   
443-635 7 Baltimore MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-12-13   
443-635 8 Baltimore MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-12-13   
443-635 9 Baltimore MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2009-12-13   
443-640 7 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-03-16   
443-641 3 Pikesville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-08-05   
443-641 4 Pikesville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-08-05   
443-641 6 Pikesville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-11-28   
443-641 7 Pikesville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-11-28   
443-643 5 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-04-08   
443-643 6 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-04-08   
443-643 7 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-04-08   
443-643 8 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-04-08   
443-648 0 Essex MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-12-09   
443-648 1 Essex MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-08-23   
443-651 9 Baltimore MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-05-20   
443-655 A Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-655 0 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-655 1 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-655 2 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-655 3 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-655 4 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-655 5 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-655 6 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-655 7 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-655 8 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-03-20   
443-655 9 Bel Air MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2011-03-20   
443-656 2 Columbia MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-01-08   
443-656 5 Columbia MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-01-08   
443-660 4 Pikesville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2022-12-12   
443-660 6 Pikesville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2012-09-24   
443-668 A Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 0 Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 1 Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 2 Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 3 Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 4 Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 5 Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 6 Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 7 Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 8 Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-668 9 Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-04-27   
443-670 2 Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-670 4 Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-670 6 Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-670 7 Catonsville MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-03-19   
443-674 2 North East MD 4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-10-18   

<< 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 >>

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.