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.

Herculaneum-Pevely MCA4, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
636-475 A PVLYMOAARS0  9533 SOUTHWESTERN BELL 520      
636-475 0   624H ONVOY SPECTRUM, LLC 520   2024-03-23   
636-475 1   9533 SOUTHWESTERN BELL 520      
636-475 2   093F ONVOY, LLC - MO 520   2002-11-19   
636-475 3   9533 SOUTHWESTERN BELL 520      
636-475 4   9533 SOUTHWESTERN BELL 520      
636-475 5   515J IP HORIZON LLC 520   2013-12-19   
636-475 6   9533 SOUTHWESTERN BELL 520      
636-475 7   9533 SOUTHWESTERN BELL 520      
636-475 8   4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2004-12-15   
636-475 9   9533 SOUTHWESTERN BELL 520      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.