Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: INHDMDINRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
301-743 A Indian Head MD 9212 VERIZON MARYLAND, INC. 236      
301-744 A Indian Head MD 9212 VERIZON MARYLAND, INC. 236      

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

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