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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Switch: COVLILCLPMD

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
618-915 1 Collinsville IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 520   2023-03-10   
618-915 2 Collinsville IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 520   2023-03-10   
618-961 6 Glen Carbon IL 7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 520   2019-01-21   

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Last updated: Sat, 02 May 2026 12:20:53 UTC

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