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

NXX: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
430-257 A Rice TX DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552      
430-257 0 Rice TX DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2019-07-12   
430-257 1 Rice TX DLLSTX97X1X  073H TELNYX LLC 552   2019-07-21   
430-257 2 Rice TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2021-02-03   
430-257 3 Rice TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2021-02-03   
430-257 4 Rice TX DLLSTXTAXTZ  624H ONVOY SPECTRUM, LLC 552   2024-05-04   
430-257 6 Rice TX DLLSTX97DSS  177F PEERLESS NETWORK OF TEXAS, LLC - TX 552   2024-03-15   
430-257 7 Rice TX DLLSTX97X9X  516J TON80 COMMUNICATIONS, LLC 552   2021-10-21   
430-257 8 Rice TX DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2019-09-09   
430-257 9 Rice TX DLLSTX37XWZ  004F BANDWIDTH.COM CLEC, LLC - TX 552   2019-09-09   

Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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