Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 620 [Rate centres in NPA 620] [Dial plan for NPA 620]

NXX: 604

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
620-604 A Liberal KS WCHTKSMBX2X  2240 LEVEL 3 COMMUNICATIONS, LLC - KS 532      
620-604 0 Liberal KS   2240 LEVEL 3 COMMUNICATIONS, LLC - KS 532      
620-604 1 Liberal KS   9533 SOUTHWESTERN BELL 532   2004-09-23   
620-604 2 Liberal KS   9533 SOUTHWESTERN BELL 532   2004-09-23   
620-604 3 Liberal KS   205F ONVOY, LLC - KS 532   2019-06-09   
620-604 4 Liberal KS   2240 LEVEL 3 COMMUNICATIONS, LLC - KS 532   2005-01-14   
620-604 5 Liberal KS   516C AT&T CORP. 532   2012-12-21   
620-604 6 Liberal KS   205F ONVOY, LLC - KS 532   2019-01-12   
620-604 7 Liberal KS   508J CENTURYLINK COMMUNICATIONS, LLC 532   2014-03-10   
620-604 8 Liberal KS   205F ONVOY, LLC - KS 532   2019-01-12   
620-604 9 Liberal KS   2240 LEVEL 3 COMMUNICATIONS, LLC - KS 532      

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

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