Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Martinstown, MO

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
660-355 A GNCYMOXADS0  1931 NORTHEAST MISSOURI RURAL TEL. CO. 524      
660-355 4   1931 NORTHEAST MISSOURI RURAL TEL. CO. 524      
660-355 7   1931 NORTHEAST MISSOURI RURAL TEL. CO. 524      
660-355 9   1931 NORTHEAST MISSOURI RURAL TEL. CO. 524      

Last updated: Sat, 02 May 2026 12:20:53 UTC

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