Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 507 [Rate centres in NPA 507] [Dial plan for NPA 507]

NXX: 578

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
507-578 A Butterfield MN OWTNMNOWTMD  719F MCC TELEPHONY OF MINNESOTA, LLC - MN 620      
507-578 0 Butterfield MN   073H TELNYX LLC 620   2020-07-09   
507-578 1 Butterfield MN   719F MCC TELEPHONY OF MINNESOTA, LLC - MN 620   2010-05-30   
507-578 2 Butterfield MN   184D ONVOY, LLC - MN 620   2021-11-25   
507-578 5 Butterfield MN   184D ONVOY, LLC - MN 620   2019-09-11   
507-578 7 Butterfield MN   508J CENTURYLINK COMMUNICATIONS, LLC 620   2017-05-09   
507-578 8 Butterfield MN   184D ONVOY, LLC - MN 620   2015-01-15   
507-578 9 Butterfield MN   624H ONVOY SPECTRUM, LLC 620   2021-10-24   

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

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