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.

Dorchester, TX

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
430-599 A DLLSTX97X5X  965H FRACTEL, LLC 552      
430-599 0 DLLSTXALDS4  903C ONVOY, LLC - TX 552      
430-599 3 SHMNTXXARMD  624H ONVOY SPECTRUM, LLC 552      
430-599 5 DLLSTX97X9X  516J TON80 COMMUNICATIONS, LLC 552      
430-599 7   177F PEERLESS NETWORK OF TEXAS, LLC - TX 552      
430-599 8 DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552      
430-599 9 DLLSTX97X5X  965H FRACTEL, LLC 552      
903-476 A DRCHTXXARL0  2154 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
903-476 0 DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552      
903-476 1 DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552      
903-476 2 DLLSTXALDS4  903C ONVOY, LLC - TX 552      
903-476 3 DLLSTXALDS4  903C ONVOY, LLC - TX 552      
903-476 4 DLLSTX97X1X  073H TELNYX LLC 552      
903-476 5 DRCHTXXARL0  2154 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 552      
903-476 6 DLLSTXALDS4  903C ONVOY, LLC - TX 552      
903-476 7 FTWQTXFH0MD  508J CENTURYLINK COMMUNICATIONS, LLC 552      
903-476 8 DLLSTXALDS4  903C ONVOY, LLC - TX 552      
903-476 9 DLLSTXALDS4  903C ONVOY, LLC - TX 552      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.