Local Calling Guide

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Frostburg, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-689 3 FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-689 4   2593 CORE COMMUNICATIONS, INC.- MD 240   2004-03-28   
301-689 5 FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-689 6 FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-689 7 FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-689 8 FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      
301-689 9 FSBGMDFSDS0  9212 VERIZON MARYLAND, INC. 240      

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Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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