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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OCN: 1276 PRESTON TEL. CO.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
563-577 A Goose Lake IA PSTNIAXODS0  634      
563-689 A Preston IA PSTNIAXODS0  634      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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