Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 636 [Rate centres in NPA 636] [Dial plan for NPA 636]

NXX: 270

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
636-270 A Ware MO STLSMOWQDS2  093F ONVOY, LLC - MO 520      
636-270 0 Ware MO STLSMO05XMX  624H ONVOY SPECTRUM, LLC 520   2024-03-23   
636-270 2 Ware MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2021-05-13   
636-270 3 Ware MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2021-05-10   
636-270 8 Ware MO STLSMOWQDS2  093F ONVOY, LLC - MO 520   2021-09-23   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.