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: 219

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
557-219 A Ladue MO STLTMOBOAMD  5814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 520   2024-03-03   
557-219 0 Ladue MO STLTMOBOAMD  5814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 520   2024-10-30   
557-219 1 Ladue MO STLTMOBOAMD  5814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 520   2024-10-30   
557-219 2 Ladue MO   490J BOOST SUBSCRIBERCO L.L.C. 520   2025-12-10   
557-219 3 Ladue MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2025-08-04   
557-219 4 Ladue MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2025-08-04   
557-219 5 Ladue MO   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2025-08-04   
557-219 6 Ladue MO STLSMOGZLMD  490J BOOST SUBSCRIBERCO L.L.C. 520   2024-12-28   
557-219 7 Ladue MO STLSMOGZLMD  490J BOOST SUBSCRIBERCO L.L.C. 520   2025-02-17   
557-219 8 Ladue MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2024-04-21   
557-219 9 Ladue MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2024-04-21   

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

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