Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Washington Zone 2, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-941 1   9212 VERIZON MARYLAND, INC. 236      
301-941 2   9212 VERIZON MARYLAND, INC. 236      
301-941 3   071F BANDWIDTH.COM CLEC, LLC - MD 236   2019-10-02   
301-941 4   071F BANDWIDTH.COM CLEC, LLC - MD 236   2019-05-06   
301-941 5   964H BARR TELL USA, INC. 236   2018-05-08   
301-941 6   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2017-10-02   
301-941 7   071F BANDWIDTH.COM CLEC, LLC - MD 236   2018-10-19   
301-941 8   9212 VERIZON MARYLAND, INC. 236      
301-941 9   9212 VERIZON MARYLAND, INC. 236      
301-951 A CHCHMDBEDS0  9212 VERIZON MARYLAND, INC. 236      
301-961 A CHCHMDBEDS0  9212 VERIZON MARYLAND, INC. 236      
301-968 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-968 0   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-968 1   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-968 2   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-968 3   829J PAETEC ITEL, LLC 236   2009-06-24   
301-968 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-968 5   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-09-07   
301-968 6   071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-10-17   
301-968 7   281E YMAX COMMUNICATIONS CORP. - MD 236   2010-09-01   
301-968 8   7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 236   2010-07-22   
301-968 9   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-986 A CHCHMDBEDS0  9212 VERIZON MARYLAND, INC. 236      

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

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