Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 557 [Rate centres in NPA 557] [Dial plan for NPA 557]

NXX: 218

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
557-218 A Ladue MO NWTPMOABGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2024-02-05   
557-218 0 Ladue MO   5814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 520   2024-10-01   
557-218 1 Ladue MO   5814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 520   2024-10-01   
557-218 2 Ladue MO   732J NUSO, LLC 520   2024-10-24   
557-218 3 Ladue MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2024-12-18   
557-218 4 Ladue MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2024-08-22   
557-218 5 Ladue MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2024-08-22   
557-218 6 Ladue MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2024-08-22   
557-218 7 Ladue MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2024-12-18   
557-218 8 Ladue MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2024-02-05   
557-218 9 Ladue MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2024-02-05   

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

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