Local Calling Guide

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Search area code/prefix (NPA/NXX)
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NPA: 636 [Rate centres in NPA 636] [Dial plan for NPA 636]

NXX: 321

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
636-321 A Maxville MO STLSMOGZWMD  829J PAETEC ITEL, LLC 520      
636-321 0 Maxville MO   829J PAETEC ITEL, LLC 520      
636-321 1 Maxville MO   508J CENTURYLINK COMMUNICATIONS, LLC 520   2014-05-05   
636-321 2 Maxville MO   829J PAETEC ITEL, LLC 520      
636-321 3 Maxville MO   7432 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 520   2007-04-18   
636-321 4 Maxville MO   829J PAETEC ITEL, LLC 520   2011-11-17   
636-321 5 Maxville MO   9533 SOUTHWESTERN BELL 520   2005-07-05   
636-321 6 Maxville MO   9533 SOUTHWESTERN BELL 520   2009-03-10   
636-321 7 Maxville MO   993E BANDWIDTH.COM CLEC, LLC - MO 520   2011-09-17   
636-321 8 Maxville MO   792K CHARTER IP ENABLED SERVICES, LLC 520   2013-09-05   
636-321 9 Maxville MO   515J IP HORIZON LLC 520   2013-12-19   

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

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