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.

NPA: 806 [Rate centres in NPA 806] [Dial plan for NPA 806]

NXX: 318

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
806-318 A Amarillo TX AMRLTX02XZX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 546      
806-318 0 Amarillo TX   004F BANDWIDTH.COM CLEC, LLC - TX 546   2010-06-20   
806-318 1 Amarillo TX   004F BANDWIDTH.COM CLEC, LLC - TX 546   2010-06-20   
806-318 2 Amarillo TX   004F BANDWIDTH.COM CLEC, LLC - TX 546   2010-06-20   
806-318 3 Amarillo TX   318C CEBRIDGE TELECOM TX , L.P. - TX 546   2009-12-21   
806-318 4 Amarillo TX   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 546   2010-08-20   
806-318 5 Amarillo TX   004F BANDWIDTH.COM CLEC, LLC - TX 546   2010-10-29   
806-318 6 Amarillo TX   004F BANDWIDTH.COM CLEC, LLC - TX 546   2010-10-29   
806-318 7 Amarillo TX   7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 546   2009-07-03   
806-318 8 Amarillo TX   004F BANDWIDTH.COM CLEC, LLC - TX 546   2010-11-18   
806-318 9 Amarillo TX   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 546   2008-08-27   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.