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: CMLDMDCMEMD

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

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
223-337 A Needmore PA 547E ONVOY, LLC - PA 240      
223-337 0 Needmore PA 547E ONVOY, LLC - PA 240   2024-02-03   
223-337 2 Needmore PA 547E ONVOY, LLC - PA 240   2023-11-13   
223-377 0 Warfordsburg PA 547E ONVOY, LLC - PA 240   2024-02-03   
223-377 2 Warfordsburg PA 547E ONVOY, LLC - PA 240   2021-04-30   
223-377 3 Warfordsburg PA 547E ONVOY, LLC - PA 240   2021-04-30   
223-377 5 Warfordsburg PA 547E ONVOY, LLC - PA 240   2023-02-12   
223-377 8 Warfordsburg PA 547E ONVOY, LLC - PA 240   2023-07-06   
227-203 7 Frederick MD 876D ONVOY, LLC - MD 240   2024-09-15   
227-214 0 Myersville MD 876D ONVOY, LLC - MD 240   2023-11-14   
227-214 1 Myersville MD 876D ONVOY, LLC - MD 240   2023-11-14   
227-223 5 Frederick MD 876D ONVOY, LLC - MD 240   2025-06-02   
227-226 A Frederick MD 876D ONVOY, LLC - MD 240   2024-03-30   
227-226 0 Frederick MD 876D ONVOY, LLC - MD 240   2024-03-30   
227-226 1 Frederick MD 876D ONVOY, LLC - MD 240   2024-03-30   
227-226 2 Frederick MD 876D ONVOY, LLC - MD 240   2024-03-30   
227-226 3 Frederick MD 876D ONVOY, LLC - MD 240   2024-03-30   
227-226 4 Frederick MD 876D ONVOY, LLC - MD 240   2024-03-30   
227-226 5 Frederick MD 876D ONVOY, LLC - MD 240   2024-03-30   
227-226 6 Frederick MD 876D ONVOY, LLC - MD 240   2024-03-30   
227-239 0 Hagerstown MD 876D ONVOY, LLC - MD 240   2024-07-12   
227-239 8 Hagerstown MD 876D ONVOY, LLC - MD 240   2025-03-02   
227-239 9 Hagerstown MD 876D ONVOY, LLC - MD 240   2025-01-06   
227-242 A Middletown MD 876D ONVOY, LLC - MD 240   2024-07-27   
227-242 0 Middletown MD 876D ONVOY, LLC - MD 240   2024-07-27   
227-247 A Thurmont MD 876D ONVOY, LLC - MD 240   2024-08-15   
227-247 0 Thurmont MD 876D ONVOY, LLC - MD 240   2024-08-15   
227-253 A Frederick MD 876D ONVOY, LLC - MD 240   2024-11-17   
227-253 0 Frederick MD 876D ONVOY, LLC - MD 240   2024-11-17   
227-253 4 Frederick MD 876D ONVOY, LLC - MD 240   2024-11-18   
227-272 A Oakland MD 876D ONVOY, LLC - MD 240   2025-03-30   
227-272 0 Oakland MD 876D ONVOY, LLC - MD 240   2025-03-30   
227-272 3 Oakland MD 876D ONVOY, LLC - MD 240   2026-06-22   
227-281 6 Frederick MD 876D ONVOY, LLC - MD 240   2026-01-04   
227-281 7 Frederick MD 876D ONVOY, LLC - MD 240   2025-10-12   
227-288 A Hagerstown MD 876D ONVOY, LLC - MD 240   2025-10-04   
227-288 0 Hagerstown MD 876D ONVOY, LLC - MD 240   2025-10-04   
227-288 1 Hagerstown MD 876D ONVOY, LLC - MD 240   2025-10-04   
227-288 7 Hagerstown MD 876D ONVOY, LLC - MD 240   2025-10-18   
227-288 8 Hagerstown MD 876D ONVOY, LLC - MD 240   2025-10-18   
227-288 9 Hagerstown MD 876D ONVOY, LLC - MD 240   2025-10-18   
227-293 0 Cumberland MD 876D ONVOY, LLC - MD 240   2025-12-14   
227-293 1 Cumberland MD 876D ONVOY, LLC - MD 240   2026-06-22   
227-334 0 Keedysville MD 876D ONVOY, LLC - MD 240   2025-10-12   
227-334 1 Keedysville MD 876D ONVOY, LLC - MD 240   2026-06-22   
227-666 A Frederick MD 876D ONVOY, LLC - MD 240   2026-02-17   
227-666 0 Frederick MD 876D ONVOY, LLC - MD 240   2026-02-17   
227-666 6 Frederick MD 876D ONVOY, LLC - MD 240   2026-02-17   
227-666 9 Frederick MD 876D ONVOY, LLC - MD 240   2026-06-13   
227-800 4 Frederick MD 876D ONVOY, LLC - MD 240   2025-04-06   

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

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.