Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Washington Zone 14, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-929 5   829J PAETEC ITEL, LLC 236      
240-929 6   318J COMCAST IP PHONE, LLC 236   2014-06-21   
240-929 7   5562 METROPCS, INC. 236   2017-01-18   
240-929 8   876D ONVOY, LLC - MD 236   2020-06-11   
240-929 9   829J PAETEC ITEL, LLC 236      
240-932 A WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-932 0   071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-03   
240-932 1   071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-03   
240-932 2   071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-03   
240-932 3   071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-03   
240-932 4   071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-09-03   
240-932 5   876D ONVOY, LLC - MD 236   2022-10-15   
240-932 6   876D ONVOY, LLC - MD 236   2022-10-15   
240-932 7   876D ONVOY, LLC - MD 236   2023-02-20   
240-932 8   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2022-09-29   
240-932 9   876D ONVOY, LLC - MD 236   2023-06-17   
240-946 A ARTNVAARXBY  965H FRACTEL, LLC 236      
240-946 0   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-12-27   
240-946 1   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-12-27   
240-946 2   876D ONVOY, LLC - MD 236   2021-12-27   
240-946 3   965H FRACTEL, LLC 236   2021-12-26   
240-946 4   5562 METROPCS, INC. 236   2021-12-27   
240-946 5   145J TERRA NOVA TELECOM INC. 236   2024-10-07   
240-946 6   624H ONVOY SPECTRUM, LLC 236   2022-02-07   
240-946 7   624H ONVOY SPECTRUM, LLC 236   2022-02-07   
240-946 8   073H TELNYX LLC 236   2022-06-17   
240-946 9   568G PEERLESS NETWORK OF MARYLAND, LLC 236   2022-03-31   
301-218 A UPMRMDCCDS0  9212 VERIZON MARYLAND, INC. 236      
301-225 A WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-225 0   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 1   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 2   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 3   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 4   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 5   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 6   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 7   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 8   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-225 9   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2009-07-20   
301-249 A UPMRMDCCDS0  9212 VERIZON MARYLAND, INC. 236      
301-262 A BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-291 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-291 0   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-291 1   5562 METROPCS, INC. 236   2016-11-10   
301-291 2   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2003-07-25   
301-291 3   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-291 4   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-291 5   071F BANDWIDTH.COM CLEC, LLC - MD 236   2012-08-12   
301-291 6   5562 METROPCS, INC. 236   2019-07-20   
301-291 7   071F BANDWIDTH.COM CLEC, LLC - MD 236   2004-11-21   

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

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