Local Calling Guide

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NPA: 410 [Rate centres in NPA 410] [Dial plan for NPA 410]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-734 6 Churchville MD   9212 VERIZON MARYLAND, INC. 238      
410-734 7 Churchville MD   9212 VERIZON MARYLAND, INC. 238      
410-734 8 Churchville MD   420C ARMSTRONG TELECOMMUNICATIONS, INC. - MD 238   2008-09-08   
410-734 9 Churchville MD   9212 VERIZON MARYLAND, INC. 238      
410-735 A Baltimore MD   829J PAETEC ITEL, LLC 238   2025-04-01   
410-735 0 Baltimore MD   829J PAETEC ITEL, LLC 238      
410-735 1 Baltimore MD   829J PAETEC ITEL, LLC 238      
410-735 2 Baltimore MD   829J PAETEC ITEL, LLC 238      
410-735 3 Baltimore MD   829J PAETEC ITEL, LLC 238      
410-735 4 Baltimore MD   9212 VERIZON MARYLAND, INC. 238   2003-10-18   
410-735 5 Baltimore MD   829J PAETEC ITEL, LLC 238      
410-735 6 Baltimore MD   9212 VERIZON MARYLAND, INC. 238   2003-09-26   
410-735 7 Baltimore MD   9212 VERIZON MARYLAND, INC. 238   2003-09-26   
410-735 8 Baltimore MD   829J PAETEC ITEL, LLC 238      
410-735 9 Baltimore MD   829J PAETEC ITEL, LLC 238      
410-736 A Baltimore MD BLTMMDCHDS2  9212 VERIZON MARYLAND, INC. 238      
410-736 0 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2003-02-02   
410-736 1 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2003-02-02   
410-736 2 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2003-02-02   
410-736 3 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2003-02-02   
410-736 4 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-736 5 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-736 6 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-736 7 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-736 8 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2003-02-02   
410-736 9 Baltimore MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2003-02-02   
410-737 A Arbutus MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-738 A Waterloo (Washington DC LATA) MD MRKKMDMKDS0  9212 VERIZON MARYLAND, INC. 236      
410-739 A Centreville MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
410-739 0 Centreville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
410-739 1 Centreville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
410-739 2 Centreville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
410-739 3 Centreville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
410-739 4 Centreville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
410-739 5 Centreville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
410-739 6 Centreville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
410-739 7 Centreville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2005-05-02   
410-739 8 Centreville MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2005-09-01   
410-739 9 Centreville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
410-740 A Columbia MD CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-741 A West River MD NRBHMDNE741  9212 VERIZON MARYLAND, INC. 238      
410-741 0 West River MD   9212 VERIZON MARYLAND, INC. 238      
410-741 1 West River MD   9212 VERIZON MARYLAND, INC. 238      
410-741 2 West River MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
410-741 3 West River MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2004-07-11   
410-741 4 West River MD   7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238   2013-01-11   
410-741 5 West River MD   9212 VERIZON MARYLAND, INC. 238      
410-741 6 West River MD   9212 VERIZON MARYLAND, INC. 238      
410-741 7 West River MD   8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-06-20   
410-741 8 West River MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2006-07-31   

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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