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.

Madison, KS

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
620-427 A MDSNKSXADS0  1801 MADISON TELEPHONE, LLC - KS 532      
620-437 A MDSNKSXADS0  1801 MADISON TELEPHONE, LLC - KS 532      
620-437 0   1801 MADISON TELEPHONE, LLC - KS 532      
620-437 1   1801 MADISON TELEPHONE, LLC - KS 532      
620-437 2   1801 MADISON TELEPHONE, LLC - KS 532      
620-437 3   1801 MADISON TELEPHONE, LLC - KS 532      
620-437 4   1801 MADISON TELEPHONE, LLC - KS 532      
620-437 5   1801 MADISON TELEPHONE, LLC - KS 532      
620-437 6   6532 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS 532      
620-437 7   6532 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS 532      
620-437 8   6532 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS 532   2026-02-02   
620-437 9   1801 MADISON TELEPHONE, LLC - KS 532      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.