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: 346 [Rate centres in NPA 346] [Dial plan for NPA 346]

NXX: 387

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-387 A Katy TX HSTOTXORDS1  2091 ETS TELEPHONE COMPANY, INC. 560      
346-387 0 Katy TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2016-09-23   
346-387 1 Katy TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2016-09-23   
346-387 2 Katy TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2016-09-23   
346-387 3 Katy TX HSTNTXJAXVX  353D CHARTER FIBERLINK TX-CCO, LLC - TX 560   2016-07-23   
346-387 4 Katy TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2016-09-23   
346-387 5 Katy TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2016-09-23   
346-387 6 Katy TX HSTNTXMOX7X  318J COMCAST IP PHONE LLC 560   2016-04-10   
346-387 7 Katy TX HSTOTXORDS1  2091 ETS TELEPHONE COMPANY, INC. 560   2016-04-09   
346-387 8 Katy TX HSTOTXORDS1  2091 ETS TELEPHONE COMPANY, INC. 560   2016-04-09   
346-387 9 Katy TX HSTNTXMOX7X  318J COMCAST IP PHONE LLC 560   2016-11-10   

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.