Local Calling Guide

Area code/prefix search

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-301 4 Gaithersburg MD 876D ONVOY, LLC - MD 236   2022-10-23   
301-301 5 Gaithersburg MD 876D ONVOY, LLC - MD 236   2022-10-23   
301-301 6 Gaithersburg MD 876D ONVOY, LLC - MD 236   2022-10-23   
301-301 7 Gaithersburg MD 876D ONVOY, LLC - MD 236   2022-10-23   
301-301 8 Gaithersburg MD 876D ONVOY, LLC - MD 236   2022-10-23   
301-301 9 Gaithersburg MD 876D ONVOY, LLC - MD 236   2022-10-23   
301-313 5 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2021-02-18   
301-321 A Washington Zone 11 MD 876D ONVOY, LLC - MD 236      
301-321 7 Washington Zone 11 MD 876D ONVOY, LLC - MD 236   2016-01-07   
301-321 8 Washington Zone 11 MD 876D ONVOY, LLC - MD 236   2016-01-07   
301-349 3 Poolesville MD 876D ONVOY, LLC - MD 236   2016-03-01   
301-355 3 Gaithersburg MD 876D ONVOY, LLC - MD 236   2008-10-05   
301-357 8 Washington Zone 3 MD 876D ONVOY, LLC - MD 236   2007-09-13   
301-364 0 Washington Zone 4 MD 876D ONVOY, LLC - MD 236   2012-06-20   
301-364 3 Washington Zone 4 MD 876D ONVOY, LLC - MD 236   2008-10-05   
301-373 1 Leonardtown MD 876D ONVOY, LLC - MD 236   2008-10-05   
301-381 A Washington Zone 2 MD 876D ONVOY, LLC - MD 236      
301-381 0 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-09-16   
301-381 1 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-09-16   
301-381 2 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-09-16   
301-381 3 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-09-16   
301-381 4 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-09-16   
301-381 5 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-09-16   
301-381 6 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-09-16   
301-381 7 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-09-16   
301-381 8 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-09-16   
301-381 9 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-09-16   
301-389 2 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2022-08-21   
301-389 5 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2016-04-06   
301-389 6 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2016-04-06   
301-396 7 Waldorf MD 876D ONVOY, LLC - MD 236   2019-02-19   
301-398 7 Washington Zone 10 MD 876D ONVOY, LLC - MD 236   2003-11-09   
301-398 8 Washington Zone 10 MD 876D ONVOY, LLC - MD 236   2003-11-09   
301-398 9 Washington Zone 10 MD 876D ONVOY, LLC - MD 236   2003-11-09   
301-409 0 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-04-25   
301-409 3 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-12-12   
301-409 4 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-12-12   
301-409 5 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-12-12   
301-409 6 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2022-12-12   
301-414 8 Damascus MD 876D ONVOY, LLC - MD 236   2016-03-11   
301-417 5 Washington Zone 10 MD 876D ONVOY, LLC - MD 236   2015-06-27   
301-433 7 Washington Zone 5 MD 876D ONVOY, LLC - MD 236   2015-06-27   
301-450 5 Washington Zone 3 MD 876D ONVOY, LLC - MD 236   2022-09-17   
301-450 6 Washington Zone 3 MD 876D ONVOY, LLC - MD 236   2022-09-17   
301-450 7 Washington Zone 3 MD 876D ONVOY, LLC - MD 236   2022-09-17   
301-450 8 Washington Zone 3 MD 876D ONVOY, LLC - MD 236   2022-09-17   
301-458 3 Washington Zone 4 MD 876D ONVOY, LLC - MD 236   2016-02-29   
301-477 0 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2024-09-15   
301-477 8 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2018-01-14   
301-477 9 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2018-01-14   
301-479 0 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2024-11-04   
301-479 5 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2023-06-17   
301-479 6 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2023-06-17   
301-479 8 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2023-06-17   
301-479 9 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2023-06-17   
301-485 2 Washington Zone 6 MD 876D ONVOY, LLC - MD 236   2016-03-02   
301-485 4 Washington Zone 6 MD 876D ONVOY, LLC - MD 236   2016-04-28   
301-485 5 Washington Zone 6 MD 876D ONVOY, LLC - MD 236   2015-06-27   
301-507 0 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2024-02-24   
301-507 1 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2024-02-24   
301-507 2 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2024-02-24   
301-507 3 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2024-02-24   
301-507 4 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2024-07-27   
301-507 7 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2024-07-27   
301-507 8 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2024-07-27   
301-507 9 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2024-07-27   
301-513 8 Washington Zone 13 MD 876D ONVOY, LLC - MD 236   2024-09-15   
301-517 6 Washington Zone 10 MD 876D ONVOY, LLC - MD 236   2018-01-13   
301-517 9 Washington Zone 10 MD 876D ONVOY, LLC - MD 236   2018-01-13   
301-539 6 La Plata MD 876D ONVOY, LLC - MD 236   2022-08-21   
301-547 7 Washington Zone 2 MD 876D ONVOY, LLC - MD 236   2020-12-03   
301-550 2 Washington Zone 10 MD 876D ONVOY, LLC - MD 236   2022-10-15   
301-569 9 Gaithersburg MD 876D ONVOY, LLC - MD 236   2012-04-05   
301-579 7 Brandywine MD 876D ONVOY, LLC - MD 236   2016-03-03   
301-579 8 Brandywine MD 876D ONVOY, LLC - MD 236   2016-03-03   
301-591 7 Gaithersburg MD 876D ONVOY, LLC - MD 236   2021-02-18   
301-597 1 Waldorf MD 876D ONVOY, LLC - MD 236   2022-04-25   
301-597 4 Waldorf MD 876D ONVOY, LLC - MD 236   2022-04-25   
301-597 7 Waldorf MD 876D ONVOY, LLC - MD 236   2022-04-25   
301-603 3 Washington Zone 11 MD 876D ONVOY, LLC - MD 236   2015-06-27   
301-610 3 Washington Zone 10 MD 876D ONVOY, LLC - MD 236   2020-04-30   
301-635 0 Washington Zone 5 MD 876D ONVOY, LLC - MD 236   2023-05-16   
301-635 1 Washington Zone 5 MD 876D ONVOY, LLC - MD 236   2023-05-16   
301-635 2 Washington Zone 5 MD 876D ONVOY, LLC - MD 236   2023-01-07   
301-635 3 Washington Zone 5 MD 876D ONVOY, LLC - MD 236   2023-09-14   
301-635 4 Washington Zone 5 MD 876D ONVOY, LLC - MD 236   2023-09-14   
301-635 5 Washington Zone 5 MD 876D ONVOY, LLC - MD 236   2023-09-14   
301-635 6 Washington Zone 5 MD 876D ONVOY, LLC - MD 236   2023-02-09   
301-635 7 Washington Zone 5 MD 876D ONVOY, LLC - MD 236   2023-02-09   
301-638 8 Waldorf MD 876D ONVOY, LLC - MD 236   2019-02-19   
301-640 5 Washington Zone 10 MD 876D ONVOY, LLC - MD 236   2012-09-06   
301-666 2 Washington Zone 14 MD 876D ONVOY, LLC - MD 236   2017-12-14   
301-679 1 Washington Zone 12 MD 876D ONVOY, LLC - MD 236   2008-10-05   
301-679 7 Washington Zone 12 MD 876D ONVOY, LLC - MD 236   2012-10-07   
301-683 5 Washington Zone 4 MD 876D ONVOY, LLC - MD 236   2014-10-24   
301-684 6 Indian Head MD 876D ONVOY, LLC - MD 236   2012-09-13   
301-685 0 Damascus MD 876D ONVOY, LLC - MD 236   2012-10-06   
301-685 7 Damascus MD 876D ONVOY, LLC - MD 236   2016-03-11   
301-686 5 Washington Zone 6 MD 876D ONVOY, LLC - MD 236   2016-04-28   
301-691 2 Poolesville MD 876D ONVOY, LLC - MD 236   2015-10-09   

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Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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