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: BYTWTXXAHMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
346-480 7 Crosby TX 903C ONVOY, LLC - TX 560   2023-09-22   
346-663 A Highlands TX 903C ONVOY, LLC - TX 560      
346-663 0 Highlands TX 903C ONVOY, LLC - TX 560   2023-10-29   
346-663 1 Highlands TX 903C ONVOY, LLC - TX 560   2023-10-29   
346-663 2 Highlands TX 903C ONVOY, LLC - TX 560   2023-07-15   
346-663 3 Highlands TX 903C ONVOY, LLC - TX 560   2023-01-16   
346-663 4 Highlands TX 903C ONVOY, LLC - TX 560   2023-01-16   
346-671 0 Baytown TX 903C ONVOY, LLC - TX 560   2023-08-26   
346-734 0 Beach City TX 903C ONVOY, LLC - TX 560   2023-10-14   
713-565 5 Huffman TX 903C ONVOY, LLC - TX 560   2023-08-31   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.