Local Calling Guide

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

NXX: 921

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-921 A Severn MD BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-921 0 Severn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-22   
410-921 1 Severn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-09-03   
410-921 2 Severn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-01-31   
410-921 3 Severn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-01-31   
410-921 4 Severn MD BLTMMDDNDS2  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-921 5 Severn MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-07-25   
410-921 6 Severn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   
410-921 7 Severn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-08-20   
410-921 8 Severn MD BLTMMDCH40Z  5562 METROPCS, INC. 238   2014-08-31   
410-921 9 Severn MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-02-26   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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