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: 7216 TELEPORT COMMUNICATIONS AMERICA, LLC WI

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
920-952 2 Fond du Lac WI MILWWIHEVMD  356   2019-11-15   
920-952 7 Fond du Lac WI MILWWIHEVMD  356   2007-12-07   
920-994 3 Random Lake WI MILWWIHEVMD  356   2023-06-15   

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Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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