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.

OCN: 876D ONVOY, LLC - MD

<< 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 >>

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
240-759 3 Washington Zone 15 (Baltimore LATA) MD   238   2023-06-16   
240-759 5 Washington Zone 15 (Baltimore LATA) MD   238   2022-01-17   
240-759 8 Washington Zone 15 (Baltimore LATA) MD   238   2024-08-24   
240-760 1 Washington Zone 2 MD   236   2016-03-02   
240-760 2 Washington Zone 2 MD   236   2016-03-02   
240-761 6 Laurel MD   236   2021-09-24   
240-763 1 Washington Zone 15 (Baltimore LATA) MD   238   2016-04-28   
240-763 2 Washington Zone 15 (Baltimore LATA) MD   238   2016-04-28   
240-763 3 Washington Zone 15 (Baltimore LATA) MD   238   2016-03-25   
240-763 4 Washington Zone 15 (Baltimore LATA) MD   238   2016-03-25   
240-763 7 Washington Zone 15 (Baltimore LATA) MD   238   2019-02-19   
240-763 8 Washington Zone 15 (Baltimore LATA) MD   238   2019-02-19   
240-769 1 Keedysville MD   240   2021-09-20   
240-769 4 Keedysville MD   240   2021-09-20   
240-769 7 Keedysville MD   240   2024-03-07   
240-771 A Poolesville MD VINNVACBDS0  236      
240-771 0 Poolesville MD   236   2016-04-18   
240-771 1 Poolesville MD   236   2016-04-18   
240-771 3 Poolesville MD   236   2016-08-05   
240-771 4 Poolesville MD   236   2016-08-05   
240-774 1 Lonaconing MD   240   2016-09-12   
240-774 2 Lonaconing MD   240   2016-09-12   
240-775 1 Westernport MD   240   2016-09-13   
240-775 2 Westernport MD   240   2016-09-13   
240-775 3 Westernport MD   240   2017-12-14   
240-776 3 La Plata MD   236   2021-12-23   
240-776 7 La Plata MD   236   2024-03-03   
240-778 6 Washington Zone 10 MD   236   2008-10-05   
240-780 5 Gaithersburg MD   236   2021-07-12   
240-781 6 Washington Zone 2 MD   236   2017-05-23   
240-782 A Damascus MD   236      
240-782 2 Damascus MD   236   2014-10-24   
240-782 3 Damascus MD   236   2014-10-24   
240-784 4 Myersville MD   240   2016-09-12   
240-784 5 Myersville MD   240   2016-09-12   
240-785 2 Oakland MD   240   2024-04-13   
240-785 3 Oakland MD   240   2021-09-20   
240-785 4 Oakland MD   240   2021-09-20   
240-785 6 Oakland MD   240   2025-01-06   
240-786 1 Laurel MD   236   2012-10-06   
240-787 6 Brandywine MD   236   2016-04-28   
240-787 7 Brandywine MD   236   2015-06-27   
240-789 4 Washington Zone 10 MD   236   2022-04-25   
240-790 5 Washington Zone 13 MD   236   2022-12-22   
240-790 9 Washington Zone 13 MD   236   2023-03-23   
240-791 4 Washington Zone 4 MD   236   2021-09-26   
240-791 5 Washington Zone 4 MD   236   2021-09-26   
240-794 3 Lexington Park-Great Mills MD   236   2021-09-24   
240-794 6 Lexington Park-Great Mills MD   236   2008-10-05   
240-794 9 Lexington Park-Great Mills MD   236   2021-09-24   

<< 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 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.