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.

Gray Summit MCA5, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
636-451 A GRSMMO55RS2  9533 SOUTHWESTERN BELL 520      
636-451 0 GRSMMO55RS2  9533 SOUTHWESTERN BELL 520      
636-451 1 GRSMMO55RS2  9533 SOUTHWESTERN BELL 520      
636-451 2 GRSMMO55RS2  9533 SOUTHWESTERN BELL 520      
636-451 3   145J TERRA NOVA TELECOM INC. 520   2024-04-21   
636-451 4 GRSMMO55RS2  9533 SOUTHWESTERN BELL 520      
636-451 5 GRSMMO55RS2  9533 SOUTHWESTERN BELL 520      
636-451 6 OLVEMOAXCA0  5607 CHARTER FIBERLINK - MISSOURI, LLC - MO 520   2005-09-02   
636-451 7 STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2005-12-16   
636-451 8   093F ONVOY, LLC - MO 520   2024-03-02   
636-451 9 STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2004-12-15   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.