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: 249

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
557-249 A Ladue MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2026-03-06   
557-249 0 Ladue MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2026-03-06   
557-249 1 Ladue MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2026-03-06   
557-249 2 Ladue MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2026-05-09   
557-249 3 Ladue MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2026-05-09   
557-249 4 Ladue MO STLSMO09XMD  7218 TELEPORT COMMUNICATIONS AMERICA, LLC - MO 520   2026-03-23   
557-249 5 Ladue MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2026-05-09   
557-249 6 Ladue MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2026-05-09   
557-249 7 Ladue MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2026-03-22   
557-249 8 Ladue MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2026-03-09   
557-249 9 Ladue MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2026-03-22   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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