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: 308 [Rate centres in NPA 308] [Dial plan for NPA 308]

NXX: 508

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
308-508 A Grand Island NE GDISNENWXUX  321J HD CARRIER LLC 646   2026-08-13   
308-508 7 Grand Island NE GDISNENWXUX  321J HD CARRIER LLC 646   2026-08-13   
308-508 8 Grand Island NE GDISNENWXUX  321J HD CARRIER LLC 646   2026-08-13   
308-508 9 Grand Island NE GDISNENWXUX  321J HD CARRIER LLC 646   2026-08-13   

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

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