Local Calling Guide

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NPA: 410 [Rate centres in NPA 410] [Dial plan for NPA 410]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-450 A Baltimore MD BLTMMDCH1DD  9212 VERIZON MARYLAND, INC. 238      
410-450 0 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-450 1 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-450 2 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-450 3 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-09-28   
410-450 4 Baltimore MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2019-08-12   
410-450 5 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-450 6 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-450 7 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-450 8 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-450 9 Baltimore MD   9212 VERIZON MARYLAND, INC. 238      
410-451 A Crofton MD COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
410-452 A Cardiff MD CRDFMDCDRS0  9212 VERIZON MARYLAND, INC. 238      
410-452 0 Cardiff MD   9212 VERIZON MARYLAND, INC. 238      
410-452 1 Cardiff MD   829J PAETEC ITEL, LLC 238   2003-02-25   
410-452 2 Cardiff MD   8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-06-05   
410-452 3 Cardiff MD   876D ONVOY, LLC - MD 238   2016-04-04   
410-452 4 Cardiff MD   2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 238   2003-12-25   
410-452 5 Cardiff MD   9212 VERIZON MARYLAND, INC. 238      
410-452 6 Cardiff MD   876D ONVOY, LLC - MD 238   2016-04-04   
410-452 7 Cardiff MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-01-02   
410-452 8 Cardiff MD   9212 VERIZON MARYLAND, INC. 238      
410-452 9 Cardiff MD   9212 VERIZON MARYLAND, INC. 238      
410-453 A Towson MD CYVLMDCKDS0  9212 VERIZON MARYLAND, INC. 238      
410-453 0 Towson MD   9212 VERIZON MARYLAND, INC. 238      
410-453 1 Towson MD   876D ONVOY, LLC - MD 238   2024-02-19   
410-453 2 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-01-10   
410-453 3 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-01-10   
410-453 4 Towson MD   9212 VERIZON MARYLAND, INC. 238      
410-453 5 Towson MD   9212 VERIZON MARYLAND, INC. 238      
410-453 6 Towson MD   9212 VERIZON MARYLAND, INC. 238      
410-453 7 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2019-01-10   
410-453 8 Towson MD   876D ONVOY, LLC - MD 238   2024-02-19   
410-453 9 Towson MD   9212 VERIZON MARYLAND, INC. 238      
410-454 A Baltimore MD BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-455 A Catonsville MD CTVLMDCTDS0  9212 VERIZON MARYLAND, INC. 238      
410-456 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
410-457 A Darlington MD DRTNMDDRRS0  9212 VERIZON MARYLAND, INC. 238      
410-457 0 Darlington MD   9212 VERIZON MARYLAND, INC. 238      
410-457 1 Darlington MD   829J PAETEC ITEL, LLC 238   2003-02-25   
410-457 2 Darlington MD   9212 VERIZON MARYLAND, INC. 238      
410-457 3 Darlington MD   876D ONVOY, LLC - MD 238   2012-10-08   
410-457 4 Darlington MD   9212 VERIZON MARYLAND, INC. 238      
410-457 5 Darlington MD   9212 VERIZON MARYLAND, INC. 238      
410-457 6 Darlington MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-03-29   
410-457 7 Darlington MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-03-03   
410-457 8 Darlington MD   420C ARMSTRONG TELECOMMUNICATIONS, INC. - MD 238   2008-09-08   
410-457 9 Darlington MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
410-458 A Baltimore MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
410-459 A Fallston MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      

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

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