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]

Block: A

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-301 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-302 A Crofton MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-303 A Aberdeen MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
443-304 A Arbutus MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-305 A Armiger-Gibson Island MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-306 A Severna Park MD BLTMMDCH40Z  6664 SPRINT SPECTRUM, L.P. 238      
443-307 A Bel Air MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-308 A Severn MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-309 A Elkton MD BLTMMDCH40Z  6664 SPRINT SPECTRUM, L.P. 238      
443-310 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-312 A Brooklyn Park-Linthicum MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-313 A Fork MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-314 A Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-315 A Catonsville MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-316 A Woodlawn MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-317 A Chase MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-318 A Cockeysville MD BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-319 A Columbia MD BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-320 A Baltimore MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-321 A Annapolis MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-322 A Towson MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-323 A Sharptown MD SLBRMDSBX6Y  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 242      
443-324 A Baltimore MD BLTMMDCH40Z  6664 SPRINT SPECTRUM, L.P. 238      
443-325 A Ellicott City MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-326 A Baltimore MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-327 A Aberdeen MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
443-328 A Sykesville MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-329 A Waterloo (Washington DC LATA) MD WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
443-330 A Cockeysville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-331 A Taneytown MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-332 A Crofton MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-333 A Annapolis MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-334 A Pikesville MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-335 A Brooklyn Park-Linthicum MD BLTMMDSNDS5  4773 XO MARYLAND, LLC 238      
443-336 A Annapolis MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-337 A Sparrows Point MD BLTQMD01BMD  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-338 A Sparks-Glencoe MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-339 A Sherwood Forest MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-340 A Westminster MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
443-341 A Catonsville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-342 A Solomons MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-343 A Millersville MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-344 A Severna Park MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-345 A Aberdeen MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
443-346 A Severna Park MD BLTQMD01BMD  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-347 A Cardiff MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-348 A Woodlawn MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, 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      
443-351 A Odenton MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.