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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
443-748 6 Millersville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-748 7 Millersville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-748 9 Millersville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2022-11-23   
443-749 A Glen Burnie MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-749 0 Glen Burnie MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-749 1 Glen Burnie MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-749 2 Glen Burnie MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-749 3 Glen Burnie MD BLTMMDCHXQX  197D VONAGE AMERICA LLC 238   2020-05-13   
443-749 4 Glen Burnie MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-749 5 Glen Burnie MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-749 6 Glen Burnie MD BLTMMDCHXQX  197D VONAGE AMERICA LLC 238   2020-05-13   
443-749 7 Glen Burnie MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-749 8 Glen Burnie MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-749 9 Glen Burnie MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-750 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-750 0 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-08-06   
443-750 1 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-08-09   
443-750 2 Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-08-09   
443-750 3 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-750 4 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-750 5 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-750 6 Baltimore MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2010-08-25   
443-750 7 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-750 8 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-750 9 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2010-10-01   
443-751 A Woodlawn MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238   2025-04-01   
443-751 0 Woodlawn MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-751 1 Woodlawn MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-751 2 Woodlawn MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
443-751 3 Woodlawn MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-751 4 Woodlawn MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-751 5 Woodlawn MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-751 6 Woodlawn MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-751 7 Woodlawn MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-751 8 Woodlawn MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-751 9 Woodlawn MD PIVLMDPKXGX  829J PAETEC ITEL, LLC 238      
443-752 A Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-752 0 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-03-03   
443-752 1 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-03-21   
443-752 2 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-10-02   
443-752 3 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-12-29   
443-752 4 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-06-04   
443-752 5 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-08-20   
443-752 6 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-08-20   
443-752 7 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-08-20   
443-752 8 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-12-14   
443-752 9 Bel Air MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-01-14   
443-753 A Waterloo (Washington DC LATA) MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
443-753 0 Waterloo (Washington DC LATA) MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
443-753 1 Waterloo (Washington DC LATA) MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      

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Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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