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
443-585 3 Darlington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-585 4 Darlington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-585 5 Darlington MD BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238      
443-585 6 Darlington MD BLTMMDCHX7X  073H TELNYX LLC 238      
443-585 7 Darlington MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238      
443-585 8 Darlington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-585 9 Darlington MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-586 A Dundalk MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-586 0 Dundalk MD   876D ONVOY, LLC - MD 238      
443-586 1 Dundalk MD   876D ONVOY, LLC - MD 238      
443-586 2 Dundalk MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-586 3 Dundalk MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-586 4 Dundalk MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-586 5 Dundalk MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-586 6 Dundalk MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-586 7 Dundalk MD   876D ONVOY, LLC - MD 238      
443-586 8 Dundalk MD   876D ONVOY, LLC - MD 238      
443-586 9 Dundalk MD   876D ONVOY, LLC - MD 238      
443-587 A Edgewood MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-587 0 Edgewood MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-587 1 Edgewood MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-587 2 Edgewood MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-587 4 Edgewood MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-587 5 Edgewood MD   145J TERRA NOVA TELECOM INC. 238      
443-587 7 Edgewood MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-587 8 Edgewood MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-587 9 Edgewood MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-588 A Parkville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-588 0 Parkville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-588 1 Parkville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-588 2 Parkville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-588 3 Parkville MD PIVLMDPKQMD  9170 BROADVIEW NETWORKS, INC. - MD 238      
443-588 4 Parkville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-588 5 Parkville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-588 6 Parkville MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-588 7 Parkville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-588 8 Parkville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-588 9 Parkville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-589 A Cockeysville MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-589 0 Cockeysville MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-589 1 Cockeysville MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-589 2 Cockeysville MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-589 3 Cockeysville MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-589 4 Cockeysville MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-589 5 Cockeysville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-589 6 Cockeysville MD   876D ONVOY, LLC - MD 238      
443-589 7 Cockeysville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-589 8 Cockeysville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-589 9 Cockeysville MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-590 A Reisterstown MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-590 1 Reisterstown MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-590 2 Reisterstown MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
443-590 3 Reisterstown MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-590 5 Reisterstown MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-590 6 Reisterstown MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-590 7 Reisterstown MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-590 8 Reisterstown MD BLTQMD012MD  964H BARR TELL USA, INC. 238      
443-590 9 Reisterstown MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-591 A Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-591 0 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-591 1 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-591 2 Glen Burnie MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-591 3 Glen Burnie MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-591 4 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-591 5 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-591 6 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-591 7 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-591 8 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-591 9 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-592 A Elkridge MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-592 0 Elkridge MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
443-592 1 Elkridge MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
443-592 2 Elkridge MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
443-592 3 Elkridge MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-592 4 Elkridge MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
443-592 5 Elkridge MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-592 6 Elkridge MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-592 7 Elkridge MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-592 8 Elkridge MD   515J IP HORIZON LLC 238      
443-592 9 Elkridge MD   145J TERRA NOVA TELECOM INC. 238      
443-593 A Elkton MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-593 0 Elkton MD   515J IP HORIZON LLC 238      
443-593 1 Elkton MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-593 2 Elkton MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-593 3 Elkton MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-593 4 Elkton MD BLTMMDCH06T  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-593 5 Elkton MD BLTMMDCH06T  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-593 6 Elkton MD   515J IP HORIZON LLC 238      
443-593 7 Elkton MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238      
443-593 8 Elkton MD BLTMMDCHXOY  6626 OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 238      
443-593 9 Elkton MD BLTMMDCHXOY  6626 OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 238      
443-594 A Sparrows Point MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-594 2 Sparrows Point MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-594 3 Sparrows Point MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-594 4 Sparrows Point MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-594 5 Sparrows Point MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-594 6 Sparrows Point MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-594 7 Sparrows Point MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-594 8 Sparrows Point MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-594 9 Sparrows Point MD   515J IP HORIZON LLC 238      

<< 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: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.