Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 410 [Rate centres in NPA 410] [Dial plan for NPA 410]

NXX: 992

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-992 A Columbia MD CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
410-992 0 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
410-992 1 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
410-992 2 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-28   
410-992 3 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
410-992 4 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
410-992 5 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
410-992 6 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
410-992 7 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
410-992 8 Columbia MD   9212 VERIZON MARYLAND, INC. 238      
410-992 9 Columbia MD   9212 VERIZON MARYLAND, INC. 238      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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