Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 430 [Rate centres in NPA 430] [Dial plan for NPA 430]

NXX: 357

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
430-357 A Sulphur Springs TX DLLSTXTAXTZ  624H ONVOY SPECTRUM, LLC 552   2024-06-08   
430-357 0 Sulphur Springs TX   624H ONVOY SPECTRUM, LLC 552   2024-06-08   
430-357 1 Sulphur Springs TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2025-01-26   
430-357 2 Sulphur Springs TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2025-01-26   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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