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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
443-653 7 Parkville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-12-13   
443-653 8 Parkville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-12-13   
443-653 9 Parkville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-654 A Waterloo (Washington DC LATA) MD ODTNMDAUDS0  9212 VERIZON MARYLAND, INC. 236      
443-654 0 Waterloo (Washington DC LATA) MD   9212 VERIZON MARYLAND, INC. 236   2008-09-27   
443-654 1 Waterloo (Washington DC LATA) MD   9212 VERIZON MARYLAND, INC. 236   2008-09-27   
443-654 2 Waterloo (Washington DC LATA) MD   9212 VERIZON MARYLAND, INC. 236   2008-09-27   
443-654 3 Waterloo (Washington DC LATA) MD   9212 VERIZON MARYLAND, INC. 236   2008-09-27   
443-654 4 Waterloo (Washington DC LATA) MD   9212 VERIZON MARYLAND, INC. 236   2008-09-27   
443-654 5 Waterloo (Washington DC LATA) MD   9212 VERIZON MARYLAND, INC. 236   2008-09-27   
443-654 6 Waterloo (Washington DC LATA) MD   9212 VERIZON MARYLAND, INC. 236   2008-09-27   
443-654 7 Waterloo (Washington DC LATA) MD   9212 VERIZON MARYLAND, INC. 236   2008-09-27   
443-654 8 Waterloo (Washington DC LATA) MD   9212 VERIZON MARYLAND, INC. 236   2008-09-27   
443-654 9 Waterloo (Washington DC LATA) MD   9212 VERIZON MARYLAND, INC. 236   2008-09-27   
443-655 A Bel Air MD CLMAMDORGT0  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 A Columbia MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-656 0 Columbia MD   829J PAETEC ITEL, LLC 238      
443-656 1 Columbia MD   624H ONVOY SPECTRUM, LLC 238   2021-05-22   
443-656 2 Columbia MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-01-08   
443-656 3 Columbia MD   829J PAETEC ITEL, LLC 238      
443-656 4 Columbia MD   829J PAETEC ITEL, LLC 238      
443-656 5 Columbia MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-01-08   
443-656 6 Columbia MD   829J PAETEC ITEL, LLC 238      
443-656 7 Columbia MD   829J PAETEC ITEL, LLC 238      
443-656 8 Columbia MD   829J PAETEC ITEL, LLC 238      
443-656 9 Columbia MD   876D ONVOY, LLC - MD 238   2021-07-11   
443-657 A Randallstown MD BLTMMDSNNMD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-657 0 Randallstown MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-11-08   
443-657 1 Randallstown MD   515J IP HORIZON LLC 238   2016-10-14   
443-657 2 Randallstown MD   7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-657 3 Randallstown MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2014-11-08   
443-657 6 Randallstown MD   145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-657 7 Randallstown MD   318J COMCAST IP PHONE, LLC 238   2015-11-14   
443-657 8 Randallstown MD   876D ONVOY, LLC - MD 238   2024-02-29   
443-657 9 Randallstown MD   876D ONVOY, LLC - MD 238   2024-02-29   
443-658 A Woodlawn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-659 A West River MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-660 A Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-660 0 Pikesville MD   515J IP HORIZON LLC 238   2013-09-06   
443-660 1 Pikesville MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2005-06-05   

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

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