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: 430 [Rate centres in NPA 430] [Dial plan for NPA 430]

NXX: 599

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
430-599 A Dorchester TX DLLSTX97X5X  965H FRACTEL, LLC 552      
430-599 0 Dorchester TX SHMNTXXASMD  903C ONVOY, LLC - TX 552   2023-07-24   
430-599 3 Dorchester TX SHMNTXXARMD  624H ONVOY SPECTRUM, LLC 552   2024-01-04   
430-599 5 Dorchester TX DLLSTX97X9X  516J TON80 COMMUNICATIONS, LLC 552   2021-10-29   
430-599 7 Dorchester TX DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2024-03-09   
430-599 8 Dorchester TX DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2022-02-04   
430-599 9 Dorchester TX DLLSTX97X5X  965H FRACTEL, LLC 552   2021-07-08   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.