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: 646

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-646 A Baltimore MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-646 0 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-646 1 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-646 2 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-646 3 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-646 4 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-646 5 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-646 6 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-646 7 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-646 8 Baltimore MD   318J COMCAST IP PHONE, LLC 238   2016-01-05   
410-646 9 Baltimore MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   

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

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