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: 291

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-291 A Baltimore MD BLTMMDCH1DD  9212 VERIZON MARYLAND, INC. 238      
410-291 0 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-291 1 Baltimore MD   551G NUSO, LLC 238   2017-06-07   
410-291 2 Baltimore MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2017-11-10   
410-291 3 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-291 4 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-291 5 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-291 6 Baltimore MD   829J PAETEC ITEL, LLC 238   2017-09-02   
410-291 7 Baltimore MD   508J CENTURYLINK COMMUNICATIONS, LLC 238   2017-08-03   
410-291 8 Baltimore MD   551G NUSO, LLC 238   2017-06-07   
410-291 9 Baltimore MD   515J IP HORIZON LLC 238   2019-04-26   

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

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