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: 344

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
940-344 A Lake Dallas TX DLLTTX01HMD  6529 T-MOBILE USA, INC. 552      
940-344 0 Lake Dallas TX DLLTTX01HMD  6529 T-MOBILE USA, INC. 552   2022-11-17   
940-344 1 Lake Dallas TX DLLTTX01HMD  6529 T-MOBILE USA, INC. 552   2022-11-17   
940-344 2 Lake Dallas TX DLLTTX01HMD  6529 T-MOBILE USA, INC. 552   2022-11-17   
940-344 3 Lake Dallas TX DLLTTX01HMD  6529 T-MOBILE USA, INC. 552   2022-11-17   
940-344 4 Lake Dallas TX DLLTTX01HMD  6529 T-MOBILE USA, INC. 552   2022-11-17   
940-344 5 Lake Dallas TX DLLTTX01HMD  6529 T-MOBILE USA, INC. 552   2022-11-17   
940-344 6 Lake Dallas TX DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2022-12-30   
940-344 7 Lake Dallas TX DNTNTXXAX7Y  903C ONVOY, LLC - TX 552   2023-08-12   
940-344 8 Lake Dallas TX DNTNTXXAX7Y  903C ONVOY, LLC - TX 552   2023-08-12   
940-344 9 Lake Dallas TX DLLTTX01HMD  6529 T-MOBILE USA, INC. 552   2022-11-17   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.