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: HSTOTX46DS0

<< 1 2 3 4 5

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
979-943 5 Bay City TX 7239 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 560   2008-09-05   

<< 1 2 3 4 5

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.