Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Creve Coeur, MO

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
557-777 4 STLSMOWQDS2  093F ONVOY, LLC - MO 520   2023-09-08   
557-777 5 STLSMOPL6MD  073H TELNYX LLC 520   2023-09-29   
557-777 6 STLSMO09XMD  7218 TELEPORT COMMUNICATIONS AMERICA, LLC - MO 520   2023-06-03   
557-777 7   145J TERRA NOVA TELECOM INC. 520   2022-10-27   
557-777 8 NWTPMOABGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2023-06-04   
557-777 9 NWTPMOABGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2023-08-24   

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Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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