Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 320 [Rate centres in NPA 320] [Dial plan for NPA 320]

NXX: 375

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
320-375 A Sandstone MN   5816 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 628      
320-375 0 Sandstone MN MPLSMNMSAMD  5816 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 628   2022-10-14   
320-375 3 Sandstone MN STPLMNMKTMD  624H ONVOY SPECTRUM, LLC 628   2024-12-19   

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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