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: 525

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-525 A Baltimore MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-525 0 Baltimore MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-525 1 Baltimore MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-525 2 Baltimore MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-525 3 Baltimore MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-525 4 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2015-08-16   
410-525 5 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2015-05-08   
410-525 6 Baltimore MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2015-08-16   
410-525 7 Baltimore MD BLTMMD91DS2  2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2016-01-31   
410-525 8 Baltimore MD ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-525 9 Baltimore MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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