Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Westernport, MD

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
227-212 A HGTWMD539MD  939H COMMIO, LLC 240      
227-212 0   939H COMMIO, LLC 240   2023-11-04   
227-212 1   939H COMMIO, LLC 240   2023-11-04   
227-212 2   939H COMMIO, LLC 240   2023-11-04   
227-212 3   939H COMMIO, LLC 240   2023-11-04   
227-212 4   939H COMMIO, LLC 240   2023-11-04   
240-775 A HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240      
240-775 0   071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-12-03   
240-775 1   876D ONVOY, LLC - MD 240   2016-09-13   
240-775 2   876D ONVOY, LLC - MD 240   2016-09-13   
240-775 3   876D ONVOY, LLC - MD 240   2017-12-14   
240-775 4   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-06-17   
240-775 5   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-06-17   
240-775 6   2593 CORE COMMUNICATIONS, INC.- MD 240   2018-06-17   
240-775 7   508J CENTURYLINK COMMUNICATIONS, LLC 240   2016-11-12   
240-775 8   073H TELNYX LLC 240   2017-08-08   
240-775 9   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2019-06-21   
240-944 A CMLDMDCMEMD  876D ONVOY, LLC - MD 240      
240-944 0   876D ONVOY, LLC - MD 240   2021-05-15   
240-944 1   876D ONVOY, LLC - MD 240   2021-05-15   
240-944 2   624H ONVOY SPECTRUM, LLC 240   2021-05-24   
240-944 3   624H ONVOY SPECTRUM, LLC 240   2022-02-26   
240-944 5   876D ONVOY, LLC - MD 240   2021-05-21   
240-944 6   876D ONVOY, LLC - MD 240   2021-05-14   
240-944 8   516J TON80 COMMUNICATIONS, LLC 240   2021-10-14   
301-359 A CMLDMDCMDS0  9212 VERIZON MARYLAND, INC. 240      
301-359 0   9212 VERIZON MARYLAND, INC. 240      
301-359 1   071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-03-01   
301-359 2   9212 VERIZON MARYLAND, INC. 240      
301-359 3   9212 VERIZON MARYLAND, INC. 240      
301-359 4   9212 VERIZON MARYLAND, INC. 240      
301-359 5   318J COMCAST IP PHONE, LLC 240   2010-03-05   
301-359 6   071F BANDWIDTH.COM CLEC, LLC - MD 240   2012-02-10   
301-359 7   2593 CORE COMMUNICATIONS, INC.- MD 240   2004-03-28   
301-359 8   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 240   2015-03-20   
301-359 9   9212 VERIZON MARYLAND, INC. 240      

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

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