Local Calling Guide

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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-473 9 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2007-05-19   
443-474 A Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-475 A Baltimore MD BLTOMDKHDS0  7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2011-07-16   
443-475 0 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-07-19   
443-475 1 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2011-07-19   
443-475 2 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2011-07-19   
443-475 3 Baltimore MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2011-07-16   
443-475 4 Baltimore MD   7228 MCI WORLDCOM COMMUNICATIONS, INC. - MD 238   2011-07-16   
443-475 5 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2011-07-19   
443-475 6 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2011-07-19   
443-475 7 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2011-07-19   
443-475 8 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2011-07-19   
443-475 9 Baltimore MD   6664 SPRINT SPECTRUM L.P. 238   2011-07-19   
443-476 A Annapolis MD ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
443-477 A Cambridge MD SLBRMDAZCM2  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-03-09   
443-477 0 Cambridge MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-03-09   
443-477 1 Cambridge MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-09-21   
443-477 2 Cambridge MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-01-14   
443-477 3 Cambridge MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-03-03   
443-477 4 Cambridge MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-08-01   
443-477 5 Cambridge MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2017-11-24   
443-477 6 Cambridge MD   318J COMCAST IP PHONE, LLC 242   2009-03-19   
443-477 7 Cambridge MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-08-02   
443-477 8 Cambridge MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2011-08-23   
443-477 9 Cambridge MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 242   2014-02-11   
443-478 A Baltimore MD CTVLMDBACM3  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-05-07   
443-478 0 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2009-05-07   
443-478 1 Baltimore MD   4773 XO MARYLAND, LLC 238   2010-01-30   
443-478 2 Baltimore MD   4773 XO MARYLAND, LLC 238   2010-01-30   
443-478 3 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-03-04   
443-478 4 Baltimore MD   4773 XO MARYLAND, LLC 238   2010-03-04   
443-478 5 Baltimore MD   4773 XO MARYLAND, LLC 238   2010-03-04   
443-478 6 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-05-03   
443-478 7 Baltimore MD   281E YMAX COMMUNICATIONS CORP. - MD 238   2009-09-24   
443-478 8 Baltimore MD   281E YMAX COMMUNICATIONS CORP. - MD 238   2009-09-24   
443-478 9 Baltimore MD   281E YMAX COMMUNICATIONS CORP. - MD 238   2009-09-24   
443-479 A Waterloo (Washington DC LATA) MD LARLMDDYDS0  9212 VERIZON MARYLAND, INC. 236      
443-480 A Chestertown MD SLBRMDAZCM2  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 0 Chestertown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 1 Chestertown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 2 Chestertown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 3 Chestertown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 4 Chestertown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 5 Chestertown MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2004-01-18   
443-480 6 Chestertown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-480 7 Chestertown MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2007-08-07   
443-480 8 Chestertown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-03-05   
443-480 9 Chestertown MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-481 A Annapolis MD CLMAMDJTDS0  2589 US LEC OF MARYLAND, INC. 238      
443-481 0 Annapolis MD   6664 SPRINT SPECTRUM L.P. 238   2005-09-08   

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Last updated: Sun, 31 May 2020 11:59:01 UTC

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