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.

Parkville, MD

<< 1 2 3

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
443-946 5   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-23   
443-946 6 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-11-13   
443-946 7 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2017-11-13   
443-946 8   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-23   
443-946 9 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2017-10-27   
443-998 A PKVLMDPKDS0  9212 VERIZON MARYLAND, INC. 238      
443-998 0 PKVLMDPKDS0  9212 VERIZON MARYLAND, INC. 238      
443-998 1 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2016-12-09   
443-998 2 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-02-23   
443-998 3 BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-998 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-02-23   
443-998 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-02-23   
443-998 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-02-23   
443-998 7 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-01-11   
443-998 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-12-31   
443-998 9 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-12-31   
667-310 A BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
667-310 0 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2021-07-30   
667-310 1 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2021-10-17   
667-310 2 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-09-23   
667-310 3 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-29   
667-310 4 BLTQMD013MD  939H COMMIO, LLC 238   2021-08-28   
667-310 5 BLTQMD013MD  939H COMMIO, LLC 238   2021-08-28   
667-310 6 BLTQMD013MD  939H COMMIO, LLC 238   2021-08-28   
667-310 7 BLTQMD013MD  939H COMMIO, LLC 238   2021-08-28   
667-310 8 BLTQMD013MD  939H COMMIO, LLC 238   2021-08-28   
667-310 9 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2021-05-28   
667-381 A BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
667-381 0 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2022-06-13   
667-381 1 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-08-27   
667-381 2 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-08-27   
667-381 3 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-02-26   
667-381 4 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-08-27   
667-381 5 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-01-22   
667-381 6 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-01-22   
667-381 7 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2022-01-21   
667-381 8 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2022-01-21   
667-381 9 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2022-01-21   
667-409 A BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
667-409 0 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-10-01   
667-409 1 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2022-10-02   
667-409 2   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-04-02   
667-409 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2023-06-16   
667-409 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2023-08-10   
667-409 5 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2023-07-24   
667-409 6 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-11-17   
667-409 7 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-11-17   
667-409 8 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-11-17   
667-409 9 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-11-17   
667-441 A CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
667-441 0 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2023-09-22   
667-441 1 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2023-10-18   
667-441 2 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2023-10-18   
667-441 3 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2023-12-16   
667-441 4 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-08-29   
667-441 5 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2024-06-01   
667-441 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-02-23   
667-441 7 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2024-02-23   
667-441 8 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2023-10-18   
667-441 9 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-09-09   
667-688 A BLTQMD01AMD  965H FRACTEL, LLC 238      
667-688 0 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2021-01-01   
667-688 1 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2021-02-09   
667-688 2 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2021-03-20   
667-688 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-12-03   
667-688 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-12-03   
667-688 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-12-03   
667-688 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-12-03   
667-688 7 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2024-09-28   
667-688 8 BLTQMD01AMD  965H FRACTEL, LLC 238   2020-09-12   
667-688 9 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-08-27   

<< 1 2 3

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.