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: 233

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
557-233 A St Louis MO   490J DISH WIRELESS, LLC 520   2025-04-21   
557-233 0 St Louis MO   490J DISH WIRELESS, LLC 520   2025-04-21   
557-233 1 St Louis MO   490J DISH WIRELESS, LLC 520   2025-04-21   
557-233 3 St Louis MO   490J DISH WIRELESS, LLC 520   2025-06-20   
557-233 4 St Louis MO   490J DISH WIRELESS, LLC 520   2025-08-15   
557-233 5 St Louis MO   490J DISH WIRELESS, LLC 520   2025-08-15   
557-233 6 St Louis MO   490J DISH WIRELESS, LLC 520   2025-08-15   
557-233 7 St Louis MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2025-04-22   
557-233 8 St Louis MO   5814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 520   2025-04-22   
557-233 9 St Louis MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2025-04-22   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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