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
667-357 7 Greensboro MD   242   2021-05-21   
667-358 1 Easton MD   242   2024-10-04   
667-358 2 Easton MD   242   2025-05-03   
667-358 4 Easton MD   242   2022-09-25   
667-358 5 Easton MD   242   2022-09-25   
667-359 3 Columbia MD   238   2022-04-25   
667-359 4 Columbia MD   238   2022-12-18   
667-360 A Odenton MD BLTMMDCH42Z  238      
667-360 0 Odenton MD   238   2024-04-05   
667-360 1 Odenton MD   238   2021-05-23   
667-360 2 Odenton MD   238   2021-05-23   
667-360 5 Odenton MD   238   2021-09-23   
667-360 6 Odenton MD   238   2021-05-22   
667-360 9 Odenton MD   238   2024-04-05   
667-361 4 Church Hill MD   242   2021-09-25   
667-363 A Sherwood Forest MD BLTMMDCH42Z  238      
667-363 4 Sherwood Forest MD   238   2021-07-12   
667-363 5 Sherwood Forest MD   238   2021-07-12   
667-363 6 Sherwood Forest MD   238   2021-05-22   
667-364 8 Stevensville MD   242   2019-03-10   
667-364 9 Stevensville MD   242   2019-03-10   
667-365 8 Chesapeake City MD   242   2021-07-12   
667-366 7 Hampstead MD   238   2019-02-19   
667-366 9 Hampstead MD   238   2019-02-19   
667-367 5 Westminster MD   238   2016-01-22   
667-368 1 Elkton MD   238   2023-08-10   
667-368 2 Elkton MD   238   2022-01-09   
667-368 5 Elkton MD   238   2023-08-10   
667-370 A Parkton MD BLTMMDCH42Z  238      
667-370 0 Parkton MD   238   2021-05-23   
667-370 1 Parkton MD   238   2021-05-23   
667-370 2 Parkton MD   238   2021-05-23   
667-370 3 Parkton MD   238   2021-05-23   
667-370 7 Parkton MD   238   2021-05-22   
667-371 2 Ellicott City MD   238   2023-08-10   
667-371 5 Ellicott City MD   238   2023-08-10   
667-371 8 Ellicott City MD   238   2022-04-25   
667-372 4 Cambridge MD   242   2019-03-04   
667-372 5 Cambridge MD   242   2019-03-04   
667-374 3 Waterloo MD   238   2025-02-01   
667-374 7 Waterloo MD   238   2022-09-25   
667-375 3 Chase MD   238   2022-04-25   
667-375 6 Chase MD   238   2023-10-22   
667-375 7 Chase MD   238   2023-10-22   
667-376 A Oxford MD SLBRMDSBXVX  242      
667-376 0 Oxford MD   242   2021-05-18   
667-376 1 Oxford MD   242   2021-05-18   
667-376 2 Oxford MD   242   2021-07-12   
667-376 7 Oxford MD   242   2021-05-17   
667-377 A Rock Hall MD SLBRMDSBXVX  242      

<< 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: Execulink Telecom

Like this site? We accept donations via PayPal.