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: 640

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
346-640 A Langham Creek TX HSTNTXMOX6X  624H ONVOY SPECTRUM, LLC 560      
346-640 0 Langham Creek TX HSTNTXYAOMD  515J IP HORIZON LLC 560   2021-03-21   
346-640 1 Langham Creek TX HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2021-06-24   
346-640 2 Langham Creek TX HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2021-06-24   
346-640 3 Langham Creek TX HSTNTXMOX6X  624H ONVOY SPECTRUM, LLC 560   2021-07-09   
346-640 4 Langham Creek TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2021-05-23   
346-640 5 Langham Creek TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2021-05-23   
346-640 6 Langham Creek TX HSTWTXUFAMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 560   2021-12-29   
346-640 7 Langham Creek TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2021-05-23   
346-640 8 Langham Creek TX HSTNTX01GT5  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 560   2021-05-23   
346-640 9 Langham Creek TX HSTNTXYAHMD  073H TELNYX LLC 560   2021-03-12   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.