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.

Baltimore, MD

<< 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 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
443-800 4   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-12-11   
443-800 5   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-12-11   
443-800 6   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-03-28   
443-800 7   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-03-28   
443-800 8   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-03-28   
443-800 9   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2011-03-28   
443-801 A BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-801 0   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-801 1   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-801 2   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-801 3   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-801 4   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-801 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-801 6   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-801 7   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-801 8   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-801 9   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-802 A BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-802 0   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-802 1   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-802 2   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-802 3   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-802 4   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-802 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-802 6   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-802 7   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-802 8   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-802 9   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-803 A BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-803 0   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-803 1   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-803 2   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-803 3   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-803 4   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-803 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-803 6   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-803 7   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-803 8   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-803 9   5562 METROPCS, INC. 238      
443-804 A BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-804 0   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-804 1   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-804 2   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-804 3   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-804 4   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-804 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-804 6   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-804 7   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-804 8   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-804 9   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-806 A BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2024-02-09   
443-806 0   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-05-30   
443-806 1   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-05-30   
443-806 2   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-05-30   
443-806 3   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-05-30   
443-806 4   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-05-30   
443-806 5   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-05-30   
443-806 6   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2006-04-29   
443-806 7   876D ONVOY, LLC - MD 238   2024-06-23   
443-806 8   876D ONVOY, LLC - MD 238   2024-06-23   
443-806 9   876D ONVOY, LLC - MD 238   2024-06-23   
443-810 A BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-810 0   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-07-16   
443-810 1   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-08-01   
443-810 2   829J PAETEC ITEL, LLC 238   2010-06-03   
443-810 3   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-08-01   
443-810 4   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2009-12-26   
443-810 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-01-26   
443-810 6   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-11-10   
443-810 7   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-11-10   
443-810 8   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-11-10   
443-810 9   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-11-10   
443-813 A BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-813 0   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-11-05   
443-813 1   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-12-14   
443-813 2   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-12-14   
443-813 3   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-02-04   
443-813 4   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-02-04   
443-813 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-02-04   
443-813 6   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-02-11   
443-813 7   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-02-11   
443-813 8   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-02-11   
443-813 9   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-04-08   
443-814 A BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-814 0   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-08-13   
443-814 1   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-08-16   
443-814 2   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-08-16   
443-814 3   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-08-16   
443-814 4   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-08-16   
443-814 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-08-16   
443-814 6   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-08-16   
443-814 7   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-814 8   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-814 9   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-12-23   
443-825 A BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-825 0   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-04-08   
443-825 1   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-04-08   
443-825 2   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-04-23   
443-825 3   829J PAETEC ITEL, LLC 238   2007-05-01   
443-825 4   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-04-03   

<< 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 >>

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.