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.

Westminster, MD

<< 1 2 3 4 5 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
443-952 8 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-952 9 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-974 A BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-974 0 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-03-05   
443-974 1 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-06-01   
443-974 2 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-07-19   
443-974 3 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-07-19   
443-974 4 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2008-10-03   
443-974 5 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2006-09-23   
443-974 6 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2006-11-02   
443-974 7 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-01-02   
443-974 8 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2007-02-02   
443-974 9 BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
667-272 A CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
667-272 0 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-09-23   
667-272 1 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-23   
667-272 2 BLTMMDCHXMX  506J TWILIO INTERNATIONAL, INC. 238   2020-12-26   
667-272 3 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2022-06-15   
667-272 4 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-11-02   
667-272 5 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-11-02   
667-272 6 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-11-02   
667-272 7 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-11-02   
667-272 8 BLTQMD01BMD  516J TON80 COMMUNICATIONS, LLC 238   2021-07-14   
667-272 9 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-11-02   
667-314 A BLTQMD012MD  964H BARR TELL USA, INC. 238      
667-314 0 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-07-12   
667-314 1 BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
667-314 2 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2016-09-27   
667-314 3 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2017-10-30   
667-314 4 BLTMMDCHX7X  073H TELNYX LLC 238   2017-03-14   
667-314 5 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2017-10-02   
667-314 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-12   
667-314 7   145J TERRA NOVA TELECOM INC. 238   2024-02-15   
667-367 A BLTMMDSN3MD  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238      
667-367 0   515J IP HORIZON LLC 238   2016-05-31   
667-367 1 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2016-09-08   
667-367 2 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2016-06-15   
667-367 3 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2015-11-13   
667-367 4 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2016-07-25   
667-367 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-01-22   
667-367 6 BLTMMDCH40Z  5562 METROPCS, INC. 238   2016-10-31   
667-367 7 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2016-05-06   
667-367 8 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-04-23   
667-367 9 BLTMMDSN3MD  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-07-12   
667-788 A BLTMMD91DS2  2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238      
667-788 0 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2021-12-16   
667-788 1 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2021-12-16   
667-788 2 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-12-19   
667-788 3 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2022-06-07   
667-788 4 BLTQMD019MD  490J DISH WIRELESS, LLC 238   2022-12-20   

<< 1 2 3 4 5 >>

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.