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: 573 [Rate centres in NPA 573] [Dial plan for NPA 573]

NXX: 561

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-561 A Fredericktown MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520      
573-561 0 Fredericktown MO MNCHMOAQGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2021-05-27   
573-561 1 Fredericktown MO OLVEMOAXCA0  5607 CHARTER FIBERLINK - MISSOURI, LLC - MO 520   2005-12-22   
573-561 2 Fredericktown MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2003-10-01   
573-561 3 Fredericktown MO MNCHMOAQGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2006-02-17   
573-561 4 Fredericktown MO MNCHMOAQGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2004-02-20   
573-561 5 Fredericktown MO STLSMOPLDS4  4932 LEVEL 3 COMMUNICATIONS, LLC - MO 520   2004-05-27   
573-561 6 Fredericktown MO MNCHMOAQGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 520   2005-04-10   
573-561 7 Fredericktown MO STLSMOGZDS5  225F PEERLESS NETWORK OF MISSOURI, LLC - MO 520   2024-12-21   
573-561 8 Fredericktown MO STLSMO09XMD  6123 TELEPORT COMMUNICATIONS AMERICA, LLC - MO 520   2016-07-05   
573-561 9 Fredericktown MO STLSMO05XMX  624H ONVOY SPECTRUM, LLC 520   2024-03-23   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.