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
443-346 A Severna Park MD BLTQMD01BMD  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-346 0 Severna Park MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-346 1 Severna Park MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-346 2 Severna Park MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-346 3 Severna Park MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-346 4 Severna Park MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-346 5 Severna Park MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-346 6 Severna Park MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-346 7 Severna Park MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-346 8 Severna Park MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-346 9 Severna Park MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-347 A Cardiff MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-347 0 Cardiff MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-347 1 Cardiff MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-347 2 Cardiff MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-347 3 Cardiff MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-347 4 Cardiff MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-347 5 Cardiff MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-347 6 Cardiff MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-347 7 Cardiff MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238      
443-347 8 Cardiff MD BLTMMDCHX7X  073H TELNYX LLC 238      
443-347 9 Cardiff MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-348 A Woodlawn MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-348 0 Woodlawn MD   876D ONVOY, LLC - MD 238      
443-348 1 Woodlawn MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-348 2 Woodlawn MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-348 3 Woodlawn MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-348 4 Woodlawn MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-348 5 Woodlawn MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-348 6 Woodlawn MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-348 7 Woodlawn MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-348 8 Woodlawn MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-348 9 Woodlawn MD   876D ONVOY, LLC - MD 238      
443-349 A Silver Run MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-350 A Elkton MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-350 0 Elkton MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-350 1 Elkton MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-350 2 Elkton MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-350 3 Elkton MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-350 4 Elkton MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-350 5 Elkton MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-350 6 Elkton MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-350 7 Elkton MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-350 8 Elkton MD BLTMMDCHXOY  6626 OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 238      
443-350 9 Elkton MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-351 A Odenton MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-351 0 Odenton MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-351 1 Odenton MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-351 2 Odenton MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-351 3 Odenton MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-351 4 Odenton MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-351 5 Odenton MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-351 6 Odenton MD   876D ONVOY, LLC - MD 238      
443-351 7 Odenton MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-351 8 Odenton MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-351 9 Odenton MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-352 A Pikesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-352 0 Pikesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-352 1 Pikesville MD BLTMMDCHDMD  551G NUSO, LLC 238      
443-352 2 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-352 3 Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-352 4 Pikesville MD OWMLMDOMDS0  9212 VERIZON MARYLAND, INC. 238      
443-352 5 Pikesville MD OWMLMDOMDS0  9212 VERIZON MARYLAND, INC. 238      
443-352 6 Pikesville MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-352 7 Pikesville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-352 8 Pikesville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-352 9 Pikesville MD BLTMMDCHDMD  551G NUSO, LLC 238      
443-353 A Cockeysville MD CYVLMDDADS0  9212 VERIZON MARYLAND, INC. 238      
443-353 0 Cockeysville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-353 1 Cockeysville MD CYVLMDDADS0  9212 VERIZON MARYLAND, INC. 238      
443-353 2 Cockeysville MD CYVLMDDADS0  9212 VERIZON MARYLAND, INC. 238      
443-353 3 Cockeysville MD CYVLMDDADS0  9212 VERIZON MARYLAND, INC. 238      
443-353 4 Cockeysville MD BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
443-353 5 Cockeysville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-353 6 Cockeysville MD PIVLMDPKFMD  9170 BROADVIEW NETWORKS, INC. - MD 238      
443-353 7 Cockeysville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-353 8 Cockeysville MD   515J IP HORIZON LLC 238      
443-353 9 Cockeysville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-354 A Glen Burnie MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-354 0 Glen Burnie MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-354 1 Glen Burnie MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-354 2 Glen Burnie MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-354 3 Glen Burnie MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-354 4 Glen Burnie MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-354 5 Glen Burnie MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-354 6 Glen Burnie MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-354 7 Glen Burnie MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-354 8 Glen Burnie MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-354 9 Glen Burnie MD   515J IP HORIZON LLC 238      
443-355 A Ellicott City MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-355 0 Ellicott City MD BLTMMDCHX7X  073H TELNYX LLC 238      
443-355 1 Ellicott City MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-355 2 Ellicott City MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-355 3 Ellicott City MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-355 4 Ellicott City MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-355 5 Ellicott City MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-355 6 Ellicott City MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-355 7 Ellicott City MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-355 8 Ellicott City MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-355 9 Ellicott City MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 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: LES.NET

Like this site? We accept donations via PayPal.