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: 245

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
557-245 A St Louis MO   7218 TELEPORT COMMUNICATIONS AMERICA, LLC - MO 520   2026-01-08   
557-245 0 St Louis MO   093F ONVOY, LLC - MO 520   2026-05-03   
557-245 1 St Louis MO   093F ONVOY, LLC - MO 520   2026-05-03   
557-245 5 St Louis MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2026-06-06   
557-245 6 St Louis MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2026-06-06   
557-245 7 St Louis MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2026-06-06   
557-245 8 St Louis MO   7218 TELEPORT COMMUNICATIONS AMERICA, LLC - MO 520   2026-01-08   
557-245 9 St Louis MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2026-06-06   

Last updated: Sun, 17 May 2026 03:26:51 UTC

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