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: 187K BARR TELL USA

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
571-739 2 Washington Zone 8 VA   236   2026-07-06   
571-753 3 Braddock VA   236   2026-05-25   
703-262 4 Washington Zone 19 VA   236   2026-05-25   
703-873 4 Washington Zone 17 VA   236   2026-05-25   

Last updated: Fri, 10 Jul 2026 02:55:48 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.