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: MIAMTXXARS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
806-868 A Miami TX 1163 VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 546      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.