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: 454

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
318-454 A Shreveport LA SHPTLAMA38Z  128L E. RITTER COMMUNICATIONS, LLC 486   2026-02-13   
318-454 1 Shreveport LA SHPTLAMA38Z  128L E. RITTER COMMUNICATIONS, LLC 486   2026-02-13   
318-454 3 Shreveport LA SHPTLAMA30Z  321J HD CARRIER LLC 486   2026-06-27   
318-454 4 Shreveport LA SHPTLAMA30Z  321J HD CARRIER LLC 486   2026-06-27   
318-454 5 Shreveport LA SHPTLAMA30Z  321J HD CARRIER LLC 486   2026-06-27   
318-454 6 Shreveport LA SHPTLAMA30Z  321J HD CARRIER LLC 486   2026-06-27   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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