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
443-314 A Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-314 0 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-314 1 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-314 2 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-314 3 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-314 4 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-314 5 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-314 6 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-314 7 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-314 8 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-314 9 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-315 A Catonsville MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-315 0 Catonsville MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-315 2 Catonsville MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-315 3 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-315 5 Catonsville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-315 6 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-315 7 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-315 8 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-315 9 Catonsville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-316 A Woodlawn MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-316 0 Woodlawn MD   876D ONVOY, LLC - MD 238      
443-316 1 Woodlawn MD   876D ONVOY, LLC - MD 238      
443-316 2 Woodlawn MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-316 3 Woodlawn MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-316 4 Woodlawn MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-316 5 Woodlawn MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-316 6 Woodlawn MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-316 7 Woodlawn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-316 8 Woodlawn MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-316 9 Woodlawn MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-317 A Chase MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-317 2 Chase MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-317 3 Chase MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-317 4 Chase MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-317 5 Chase MD   145J TERRA NOVA TELECOM INC. 238      
443-317 6 Chase MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-317 7 Chase MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-317 8 Chase MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-317 9 Chase MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-318 A Cockeysville MD BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-318 0 Cockeysville MD BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-318 1 Cockeysville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-318 2 Cockeysville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-318 3 Cockeysville MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-318 4 Cockeysville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-318 5 Cockeysville MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-318 6 Cockeysville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-318 7 Cockeysville MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-318 8 Cockeysville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-318 9 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      
443-319 0 Columbia MD BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-319 1 Columbia MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-319 2 Columbia MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-319 3 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-319 4 Columbia MD PIVLMDPKFMD  5966 LIGHTWAVE COMMUNICATIONS, LLC - MD 238      
443-319 5 Columbia MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-319 6 Columbia MD BLARMDBL1MD  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 238      
443-319 7 Columbia MD BLTMMDCHFMD  5562 METROPCS, INC. 238      
443-319 8 Columbia MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-319 9 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      
443-320 0 Baltimore MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-320 1 Baltimore MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-320 2 Baltimore MD BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-320 3 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-320 4 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-320 5 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-320 6 Baltimore MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-320 7 Baltimore MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-320 8 Baltimore MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-320 9 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      
443-322 0 Towson MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-322 1 Towson MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-322 2 Towson MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-322 3 Towson MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-322 4 Towson MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-322 5 Towson MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-322 6 Towson MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-322 7 Towson MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-322 8 Towson MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-322 9 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      
443-323 0 Sharptown MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
443-323 1 Sharptown MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
443-323 2 Sharptown MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242      
443-323 3 Sharptown MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242      
443-323 4 Sharptown MD   2593 CORE COMMUNICATIONS, INC.- MD 242      
443-323 5 Sharptown MD   145J TERRA NOVA TELECOM INC. 242      
443-323 6 Sharptown MD   2593 CORE COMMUNICATIONS, INC.- MD 242      
443-323 7 Sharptown MD   2593 CORE COMMUNICATIONS, INC.- MD 242      
443-323 8 Sharptown MD   2593 CORE COMMUNICATIONS, INC.- MD 242      
443-323 9 Sharptown MD SLBRMDSBX6Y  7944 CAVALIER TELEPHONE, LLC (MID-ATLANTIC) - MD 242      
443-324 A Baltimore MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-324 0 Baltimore MD BLTMMDCH40Z  5562 METROPCS, INC. 238      
443-324 1 Baltimore MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-324 2 Baltimore MD BLTMMDCH40Z  5562 METROPCS, INC. 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: Execulink Telecom

Like this site? We accept donations via PayPal.