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.

Cedar Hill, TX

1 2 3 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
214-203 A   903C ONVOY, LLC - TX 552      
214-203 0   903C ONVOY, LLC - TX 552   2026-01-04   
214-203 2   145J TERRA NOVA TELECOM INC. 552   2025-10-17   
214-203 3   883K AHOI LLC 552   2025-12-17   
214-203 9   903C ONVOY, LLC - TX 552      
214-247 A DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
214-247 0 DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
214-247 1 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2019-02-18   
214-247 2 DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2004-11-05   
214-247 3 DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2004-11-05   
214-247 4 DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2005-11-04   
214-247 5 DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
214-247 6 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2011-01-21   
214-247 7 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2010-06-15   
214-247 8 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2003-10-27   
214-247 9 DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
214-602 A DLLFTXFQDS1  7516 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552      
214-602 0   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2004-12-09   
214-602 1   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2004-12-09   
214-602 2   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2004-12-09   
214-602 3   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2004-12-09   
214-602 4   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2004-12-09   
214-602 5   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2004-12-09   
214-602 6   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2004-12-09   
214-602 7   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2004-12-09   
214-602 8   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2004-12-09   
214-602 9   7263 LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 552   2004-12-09   
469-272 A DLLSTXCHDS0  9533 SOUTHWESTERN BELL 552      
469-272 0 DLLSTXCHDS0  9533 SOUTHWESTERN BELL 552      
469-272 1   145J TERRA NOVA TELECOM INC. 552   2021-10-05   
469-272 2 DLLSTXCHDS0  9533 SOUTHWESTERN BELL 552      
469-272 3 DLLSTXCHDS0  9533 SOUTHWESTERN BELL 552      
469-272 4 DLLSTXCHDS0  9533 SOUTHWESTERN BELL 552      
469-272 5 DLLSTXCHDS0  9533 SOUTHWESTERN BELL 552      
469-272 6 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2010-10-24   
469-272 7 DLLSTXCHDS0  9533 SOUTHWESTERN BELL 552      
469-272 8 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2004-01-03   
469-272 9 DLLSTXCHDS0  9533 SOUTHWESTERN BELL 552      
469-382 A   793K TWC IP ENABLED SERVICES, LLC 552      
469-382 0   793K TWC IP ENABLED SERVICES, LLC 552   2018-02-09   
469-382 1 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2018-03-02   
469-382 2 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2018-06-09   
469-382 3 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2020-08-16   
469-382 4 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2020-08-16   
469-382 5 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2020-08-16   
469-382 6   903C ONVOY, LLC - TX 552   2025-02-02   
469-382 7 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2021-01-31   
469-382 8 DLLSTXALDS4  903C ONVOY, LLC - TX 552   2021-01-31   
469-382 9 DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2021-05-10   
469-523 A DLLSTXALDS4  903C ONVOY, LLC - TX 552      

1 2 3 >>

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.