Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 601 [Rate centres in NPA 601] [Dial plan for NPA 601]

NXX: 640

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
601-640 A Seminary MS JCSNMSPSXBY  516C AT&T CORP. 482      
601-640 0 Seminary MS   992E BANDWIDTH.COM CLEC, LLC - MS 482   2012-01-12   
601-640 1 Seminary MS   992E BANDWIDTH.COM CLEC, LLC - MS 482   2015-06-15   
601-640 2 Seminary MS   719E ONVOY, LLC - MS 482   2016-04-11   
601-640 3 Seminary MS   719E ONVOY, LLC - MS 482   2016-04-11   
601-640 4 Seminary MS   719E ONVOY, LLC - MS 482   2016-09-03   
601-640 5 Seminary MS   719E ONVOY, LLC - MS 482   2016-09-03   
601-640 6 Seminary MS   5178 LEVEL 3 COMMUNICATIONS, LLC - MS 482   2014-04-07   
601-640 7 Seminary MS   516C AT&T CORP. 482   2011-10-10   
601-640 8 Seminary MS   073H TELNYX LLC 482   2018-11-30   
601-640 9 Seminary MS   458C TELEPORT COMMUNICATIONS AMERICA MS - LLC 482   2018-12-10   

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

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