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: 490J BOOST SUBSCRIBERCO L.L.C.

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
667-462 A Elkton MD BLTQMD019MD  238   2024-02-04   
667-462 0 Elkton MD BLTQMD019MD  238   2024-02-04   
667-466 1 Havre de Grace MD BLTQMD019MD  238   2023-03-12   
667-484 A Westminster MD BLTQMD019MD  238   2024-07-12   
667-484 0 Westminster MD BLTQMD019MD  238   2024-07-12   
667-484 1 Westminster MD BLTQMD019MD  238   2024-07-12   
667-487 0 Baltimore MD BLTQMD019MD  238   2024-10-16   
667-487 2 Baltimore MD BLTQMD019MD  238   2024-12-16   
667-495 4 Baltimore MD   238   2025-01-31   
667-495 5 Baltimore MD   238   2025-02-24   
667-495 6 Baltimore MD   238   2025-03-24   
667-495 7 Baltimore MD   238   2025-04-28   
667-495 8 Baltimore MD   238   2025-05-26   
667-495 9 Baltimore MD   238   2025-06-23   
667-502 3 Columbia MD   238   2025-09-29   
667-519 1 Baltimore MD   238   2025-09-29   
667-519 3 Baltimore MD   238   2025-11-24   
667-527 A Glen Burnie MD   238   2025-11-01   
667-527 0 Glen Burnie MD   238   2025-11-01   
667-527 1 Glen Burnie MD   238   2025-12-18   
667-527 2 Glen Burnie MD   238   2026-02-12   
667-527 3 Glen Burnie MD   238   2026-01-23   
667-527 4 Glen Burnie MD   238   2026-01-23   
667-527 5 Glen Burnie MD   238   2026-02-10   
667-527 6 Glen Burnie MD   238   2026-02-10   
667-527 7 Glen Burnie MD   238   2026-03-10   
667-535 A Rising Sun MD   238   2026-02-05   
667-535 0 Rising Sun MD   238   2026-02-05   
667-535 1 Rising Sun MD   238   2026-03-23   
667-536 A Still Pond MD   242   2026-03-05   
667-536 0 Still Pond MD   242   2026-03-05   
667-536 1 Still Pond MD   242   2026-03-05   
667-539 5 Baltimore MD   238   2026-06-14   
667-539 6 Baltimore MD   238   2026-07-28   
667-576 1 Jarrettsville MD BLTQMD019MD  238   2022-09-08   
667-670 8 Sudlersville MD SLBRMD908MD  242   2022-12-20   
667-743 1 Queenstown MD SLBRMD908MD  242   2023-02-27   
667-788 4 Westminster MD BLTQMD019MD  238   2022-12-20   
669-349 3 San Jose: North DA CA SNJUCACL00Z  722   2025-01-11   
669-349 5 San Jose: North DA CA SNJUCACL00Z  722   2025-06-07   
669-364 2 San Jose: North DA CA   722   2026-04-09   
669-364 3 San Jose: North DA CA   722   2026-07-07   
669-364 8 San Jose: North DA CA   722   2026-09-05   
669-639 1 Los Gatos CA SNJUCACL00Z  722   2023-06-08   
678-254 4 Atlanta Northeast GA ATLNGAMQXBX  438   2025-01-09   
678-254 5 Atlanta Northeast GA ATLNGAMQXBX  438   2025-01-09   
678-266 3 Atlanta Northeast GA ATLNGAMQXBX  438   2025-03-09   
678-266 4 Atlanta Northeast GA ATLNGAMQXBX  438   2025-04-08   
680-229 A Ontario NY SYRCNY022MD  136      
680-229 9 Ontario NY SYRCNY022MD  136   2023-02-01   

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Last updated: Sun, 17 May 2026 03:26:51 UTC

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