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.

Switch: BLTMMDCH42Z

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

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
443-494 2 Millersville MD 876D ONVOY, LLC - MD 238   2012-10-07   
443-494 5 Millersville MD 876D ONVOY, LLC - MD 238   2021-04-02   
443-495 6 Parkville MD 876D ONVOY, LLC - MD 238   2018-05-27   
443-499 5 Jarrettsville MD 876D ONVOY, LLC - MD 238   2023-10-22   
443-499 9 Jarrettsville MD 876D ONVOY, LLC - MD 238   2012-10-07   
443-501 2 Pikesville MD 876D ONVOY, LLC - MD 238   2012-10-08   
443-508 7 Hampstead MD 876D ONVOY, LLC - MD 238   2012-10-07   
443-512 2 Edgewood MD 876D ONVOY, LLC - MD 238   2014-09-05   
443-516 A Sykesville MD 876D ONVOY, LLC - MD 238      
443-516 8 Sykesville MD 876D ONVOY, LLC - MD 238   2016-03-28   
443-516 9 Sykesville MD 876D ONVOY, LLC - MD 238   2016-03-28   
443-526 3 Havre de Grace MD 876D ONVOY, LLC - MD 238   2016-03-24   
443-526 4 Havre de Grace MD 876D ONVOY, LLC - MD 238   2016-03-24   
443-526 7 Havre de Grace MD 876D ONVOY, LLC - MD 238   2015-08-01   
443-526 8 Havre de Grace MD 876D ONVOY, LLC - MD 238   2015-08-01   
443-530 5 Dundalk MD 876D ONVOY, LLC - MD 238   2016-01-22   
443-533 5 Jarrettsville MD 876D ONVOY, LLC - MD 238   2016-04-04   
443-533 6 Jarrettsville MD 876D ONVOY, LLC - MD 238   2016-04-04   
443-543 8 Arbutus MD 876D ONVOY, LLC - MD 238   2014-10-06   
443-543 9 Arbutus MD 876D ONVOY, LLC - MD 238   2014-10-06   
443-545 0 Columbia MD 876D ONVOY, LLC - MD 238   2021-09-25   
443-545 7 Columbia MD 876D ONVOY, LLC - MD 238   2016-03-03   
443-550 7 North Beach MD 876D ONVOY, LLC - MD 238   2012-10-07   
443-551 0 Woodlawn MD 876D ONVOY, LLC - MD 238   2024-05-11   
443-551 2 Woodlawn MD 876D ONVOY, LLC - MD 238   2024-07-05   
443-551 6 Woodlawn MD 876D ONVOY, LLC - MD 238   2025-02-01   
443-551 7 Woodlawn MD 876D ONVOY, LLC - MD 238   2025-02-01   
443-551 8 Woodlawn MD 876D ONVOY, LLC - MD 238   2024-10-21   
443-551 9 Woodlawn MD 876D ONVOY, LLC - MD 238   2024-10-21   
443-557 3 Glen Burnie MD 876D ONVOY, LLC - MD 238   2016-02-29   
443-560 0 Baltimore MD 876D ONVOY, LLC - MD 238   2024-02-24   
443-563 3 Baltimore MD 876D ONVOY, LLC - MD 238   2024-04-04   
443-563 5 Baltimore MD 876D ONVOY, LLC - MD 238   2024-04-04   
443-563 9 Baltimore MD 876D ONVOY, LLC - MD 238   2024-04-04   
443-565 3 Randallstown MD 876D ONVOY, LLC - MD 238   2026-06-22   
443-565 4 Randallstown MD 876D ONVOY, LLC - MD 238   2016-04-28   
443-565 6 Randallstown MD 876D ONVOY, LLC - MD 238   2016-04-28   
443-568 3 Arbutus MD 876D ONVOY, LLC - MD 238   2012-10-07   
443-572 3 Glen Burnie MD 876D ONVOY, LLC - MD 238   2014-09-04   
443-572 4 Glen Burnie MD 876D ONVOY, LLC - MD 238   2016-02-29   
443-576 2 Randallstown MD 876D ONVOY, LLC - MD 238   2016-03-14   
443-576 5 Randallstown MD 876D ONVOY, LLC - MD 238   2016-03-14   
443-578 3 Cockeysville MD 876D ONVOY, LLC - MD 238   2012-02-27   
443-581 A Chase MD 876D ONVOY, LLC - MD 238      
443-581 0 Chase MD 876D ONVOY, LLC - MD 238   2021-03-04   
443-581 1 Chase MD 876D ONVOY, LLC - MD 238   2021-03-04   
443-583 0 Columbia MD 876D ONVOY, LLC - MD 238   2016-03-03   
443-583 5 Columbia MD 876D ONVOY, LLC - MD 238   2014-09-01   
443-585 3 Darlington MD 876D ONVOY, LLC - MD 238   2016-04-10   
443-585 4 Darlington MD 876D ONVOY, LLC - MD 238   2016-04-10   
443-585 8 Darlington MD 876D ONVOY, LLC - MD 238   2014-09-19   
443-585 9 Darlington MD 876D ONVOY, LLC - MD 238   2014-09-19   
443-586 0 Dundalk MD 876D ONVOY, LLC - MD 238   2024-02-29   
443-586 1 Dundalk MD 876D ONVOY, LLC - MD 238   2024-02-29   
443-586 7 Dundalk MD 876D ONVOY, LLC - MD 238   2024-02-29   
443-586 8 Dundalk MD 876D ONVOY, LLC - MD 238   2024-07-27   
443-586 9 Dundalk MD 876D ONVOY, LLC - MD 238   2024-09-15   
443-589 6 Cockeysville MD 876D ONVOY, LLC - MD 238   2024-07-15   
443-589 7 Cockeysville MD 876D ONVOY, LLC - MD 238   2016-03-14   
443-589 8 Cockeysville MD 876D ONVOY, LLC - MD 238   2016-03-14   
443-590 0 Reisterstown MD 876D ONVOY, LLC - MD 238   2024-12-14   
443-590 1 Reisterstown MD 876D ONVOY, LLC - MD 238   2025-06-13   
443-590 7 Reisterstown MD 876D ONVOY, LLC - MD 238   2016-03-21   
443-590 9 Reisterstown MD 876D ONVOY, LLC - MD 238   2016-03-21   
443-594 6 Sparrows Point MD 876D ONVOY, LLC - MD 238   2012-10-08   
443-594 7 Sparrows Point MD 876D ONVOY, LLC - MD 238   2016-03-24   
443-594 8 Sparrows Point MD 876D ONVOY, LLC - MD 238   2016-03-24   
443-595 9 Sparks-Glencoe MD 876D ONVOY, LLC - MD 238   2012-10-08   
443-596 0 Essex MD 876D ONVOY, LLC - MD 238   2024-02-25   
443-596 6 Essex MD 876D ONVOY, LLC - MD 238   2018-05-27   
443-596 9 Essex MD 876D ONVOY, LLC - MD 238   2024-02-25   
443-597 4 Severna Park MD 876D ONVOY, LLC - MD 238   2025-05-10   
443-598 5 Sherwood Forest MD 876D ONVOY, LLC - MD 238   2020-10-17   
443-601 3 Fallston MD 876D ONVOY, LLC - MD 238   2016-03-23   
443-601 4 Fallston MD 876D ONVOY, LLC - MD 238   2016-03-23   
443-606 6 Fork MD 876D ONVOY, LLC - MD 238   2015-11-27   
443-620 1 Waterloo MD 876D ONVOY, LLC - MD 238   2021-04-29   
443-625 0 Fork MD 876D ONVOY, LLC - MD 238   2025-05-03   
443-625 2 Fork MD 876D ONVOY, LLC - MD 238   2015-06-13   
443-625 4 Fork MD 876D ONVOY, LLC - MD 238   2015-06-13   
443-627 9 Baltimore MD 876D ONVOY, LLC - MD 238   2010-10-20   
443-637 6 Armiger-Gibson Island MD 876D ONVOY, LLC - MD 238   2012-10-07   
443-639 1 Hampstead MD 876D ONVOY, LLC - MD 238   2024-05-23   
443-639 8 Hampstead MD 876D ONVOY, LLC - MD 238   2014-10-21   
443-639 9 Hampstead MD 876D ONVOY, LLC - MD 238   2014-10-21   
443-645 4 Millersville MD 876D ONVOY, LLC - MD 238   2016-03-24   
443-645 5 Millersville MD 876D ONVOY, LLC - MD 238   2016-03-24   
443-645 6 Millersville MD 876D ONVOY, LLC - MD 238   2016-10-20   
443-646 4 North Beach MD 876D ONVOY, LLC - MD 238   2016-03-23   
443-646 8 North Beach MD 876D ONVOY, LLC - MD 238   2016-03-23   
443-647 3 New Windsor MD 876D ONVOY, LLC - MD 238   2016-04-08   
443-647 4 New Windsor MD 876D ONVOY, LLC - MD 238   2016-04-08   
443-647 8 New Windsor MD 876D ONVOY, LLC - MD 238   2016-03-17   
443-647 9 New Windsor MD 876D ONVOY, LLC - MD 238   2016-03-17   
443-648 9 Essex MD 876D ONVOY, LLC - MD 238   2012-10-07   
443-652 1 Towson MD 876D ONVOY, LLC - MD 238   2024-11-04   
443-656 9 Columbia MD 876D ONVOY, LLC - MD 238   2021-07-11   
443-657 8 Randallstown MD 876D ONVOY, LLC - MD 238   2024-02-29   
443-657 9 Randallstown MD 876D ONVOY, LLC - MD 238   2024-02-29   
443-658 A Woodlawn MD 876D ONVOY, LLC - MD 238      

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

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.