Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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St Peters, MO

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
636-875 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2009-10-15   
636-875 5   829J PAETEC ITEL, LLC 520   2007-08-27   
636-875 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2012-10-26   
636-875 7   4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2011-01-29   
636-875 8   5814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 520   2011-03-26   
636-875 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2014-10-17   

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Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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