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: ARTNVAARXKY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
227-263 8 Waldorf MD 732J NUSO, LLC 236   2025-02-03   
227-263 9 Waldorf MD 732J NUSO, LLC 236   2025-02-03   
240-518 A Waldorf MD 732J NUSO, LLC 236      
240-518 1 Waldorf MD 732J NUSO, LLC 236   2022-10-30   
571-632 4 Manassas VA 732J NUSO, LLC 236   2025-07-14   
571-676 7 Manassas VA 732J NUSO, LLC 236   2025-07-14   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.