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.

Festus-Crystal City MCA5, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
636-931 A FSTSMOYEDS0  9533 SOUTHWESTERN BELL 520      
636-931 0 FSTSMOYEDS0  9533 SOUTHWESTERN BELL 520      
636-931 1 FSTSMOYEDS0  9533 SOUTHWESTERN BELL 520      
636-931 2 FSTSMOYEDS0  9533 SOUTHWESTERN BELL 520      
636-931 3 FSTSMOYEDS0  9533 SOUTHWESTERN BELL 520      
636-931 4 FSTSMOYEDS0  9533 SOUTHWESTERN BELL 520      
636-931 5 FSTSMOYEDS0  9533 SOUTHWESTERN BELL 520      
636-931 6 FSTSMOYEDS0  9533 SOUTHWESTERN BELL 520      
636-931 7 FSTSMOYEDS0  9533 SOUTHWESTERN BELL 520      
636-931 8 STLTMOBOAMD  5814 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 520   2019-01-21   
636-931 9 STLSMOWQDS2  093F ONVOY, LLC - MO 520   2019-02-02   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.