Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 636 [Rate centres in NPA 636] [Dial plan for NPA 636]

NXX: 637

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
636-637 A Festus-Crystal City MO STLTMOBODS1  7432 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 520      
636-637 0 Festus-Crystal City MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2024-03-02   
636-637 1 Festus-Crystal City MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2023-08-12   
636-637 2 Festus-Crystal City MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2023-08-12   
636-637 3 Festus-Crystal City MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2023-08-12   
636-637 4 Festus-Crystal City MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2023-08-12   
636-637 5 Festus-Crystal City MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2023-08-12   
636-637 6 Festus-Crystal City MO STLTMOBODS1  7432 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 520   2019-11-02   
636-637 7 Festus-Crystal City MO STLTMOBODS1  7432 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 520   2019-11-02   
636-637 8 Festus-Crystal City MO STLSMOGZHMD  516J TON80 COMMUNICATIONS, LLC 520   2022-02-04   
636-637 9 Festus-Crystal City MO MNCHMOAQGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2024-01-21   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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