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: 770

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
507-770 A Springfield MN OWTNMNOWTMD  719F MCC TELEPHONY OF MINNESOTA, LLC - MN 620      
507-770 0 Springfield MN   145J TERRA NOVA TELECOM INC. 620   2025-09-05   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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