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: 318 [Rate centres in NPA 318] [Dial plan for NPA 318]

NXX: 856

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
318-856 A Ruston LA   749E ONVOY, LLC - LA 486   2025-05-05   
318-856 0 Ruston LA   749E ONVOY, LLC - LA 486   2025-05-05   
318-856 1 Ruston LA   749E ONVOY, LLC - LA 486   2025-05-10   
318-856 9 Ruston LA   6214 NEW CINGULAR WIRELESS PCS, LLC - GA 486   2026-01-12   

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

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