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: 940 [Rate centres in NPA 940] [Dial plan for NPA 940]

NXX: 688

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
940-688 A Slidell TX DLLSTX97X5X  965H FRACTEL, LLC 552      
940-688 0 Slidell TX DCTRTXXATMD  903C ONVOY, LLC - TX 552   2024-04-28   
940-688 6 Slidell TX   145J TERRA NOVA TELECOM INC. 552   2025-08-22   
940-688 8 Slidell TX DLLSTX97X5X  965H FRACTEL, LLC 552   2021-07-08   

Last updated: Mon, 15 Sep 2025 02:24:40 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.