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.

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

<< 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 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-848 0 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-09-12   
443-848 1 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2003-11-03   
443-848 2 Glen Burnie MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2003-12-01   
443-848 3 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2003-12-19   
443-848 4 Glen Burnie MD   5562 METROPCS, INC. 238   2017-01-06   
443-848 5 Glen Burnie MD   145J TERRA NOVA TELECOM INC. 238   2021-01-27   
443-848 6 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-02-28   
443-848 7 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-04-01   
443-848 8 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2003-09-03   
443-848 9 Glen Burnie MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2004-06-03   
443-849 A Towson MD TWSNMDTWDS0  9212 VERIZON MARYLAND, INC. 238      
443-850 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-851 A Catonsville MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-851 0 Catonsville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-851 1 Catonsville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-851 2 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-04-27   
443-851 3 Catonsville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-851 4 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-04-27   
443-851 5 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-04-27   
443-851 6 Catonsville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-851 7 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-04-27   
443-851 8 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-04-27   
443-851 9 Catonsville MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-852 A Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-852 0 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-852 1 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-852 2 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-852 3 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-852 4 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-852 5 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-852 6 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-852 7 Annapolis MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-852 8 Annapolis MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-12-20   
443-852 9 Annapolis MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2007-01-03   
443-853 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-853 0 Baltimore MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2010-09-24   
443-853 1 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2011-01-10   
443-853 2 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-15   
443-853 3 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-15   
443-853 4 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-20   
443-853 5 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-20   
443-853 6 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-20   
443-853 7 Baltimore MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-10-20   
443-853 8 Baltimore MD   876D ONVOY, LLC - MD 238   2018-12-13   
443-853 9 Baltimore MD   876D ONVOY, LLC - MD 238   2018-12-13   
443-854 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-855 A Aberdeen MD   829J PAETEC ITEL, LLC 236   2025-04-01   
443-855 0 Aberdeen MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2012-11-27   
443-855 1 Aberdeen MD   829J PAETEC ITEL, LLC 236   2005-06-19   
443-855 2 Aberdeen MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-855 3 Aberdeen MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-855 4 Aberdeen MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-855 5 Aberdeen MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-855 6 Aberdeen MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-855 7 Aberdeen MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-855 8 Aberdeen MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-855 9 Aberdeen MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2010-10-20   
443-856 A Ocean City MD SLBRMD90DS0  2593 CORE COMMUNICATIONS, INC.- MD 242      
443-856 0 Ocean City MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2016-07-06   
443-856 1 Ocean City MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2002-08-23   
443-856 2 Ocean City MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2008-07-29   
443-856 3 Ocean City MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2016-07-06   
443-856 4 Ocean City MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2005-02-17   
443-856 5 Ocean City MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2007-07-27   
443-856 6 Ocean City MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2013-03-17   
443-856 7 Ocean City MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2012-08-17   
443-856 8 Ocean City MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2004-01-18   
443-856 9 Ocean City MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242   2004-01-18   
443-857 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-858 A Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-859 A Salisbury MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-859 0 Salisbury MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242      
443-859 1 Salisbury MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-12-14   
443-859 2 Salisbury MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-12-14   
443-859 3 Salisbury MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-03-03   
443-859 4 Salisbury MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-03-03   
443-859 5 Salisbury MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2008-08-14   
443-859 6 Salisbury MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2011-07-21   
443-859 7 Salisbury MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2007-08-02   
443-859 8 Salisbury MD   318J COMCAST IP PHONE, LLC 242   2007-08-13   
443-859 9 Salisbury MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-05-02   
443-860 A Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-860 0 Catonsville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-08-17   
443-860 1 Catonsville MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-18   
443-860 2 Catonsville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-08-17   
443-860 3 Catonsville MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-860 4 Catonsville MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2010-12-29   
443-860 5 Catonsville MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-01-18   
443-860 6 Catonsville MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-08-17   
443-860 7 Catonsville MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2011-11-04   
443-860 8 Catonsville MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-860 9 Catonsville MD   318J COMCAST IP PHONE, LLC 238   2006-12-14   
443-861 A Aberdeen MD ABRDMDABDS0  9212 VERIZON MARYLAND, INC. 236      
443-861 0 Aberdeen MD   9212 VERIZON MARYLAND, INC. 236   2009-10-11   
443-861 1 Aberdeen MD   9212 VERIZON MARYLAND, INC. 236   2009-10-11   
443-861 2 Aberdeen MD   9212 VERIZON MARYLAND, INC. 236   2009-10-11   
443-861 3 Aberdeen MD   9212 VERIZON MARYLAND, INC. 236   2009-10-11   
443-861 4 Aberdeen MD   9212 VERIZON MARYLAND, INC. 236   2009-10-11   
443-861 5 Aberdeen MD   9212 VERIZON MARYLAND, INC. 236   2009-10-11   
443-861 6 Aberdeen MD   9212 VERIZON MARYLAND, INC. 236   2009-10-11   

<< 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 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 >>

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.