Local Calling Guide

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Washington Zone 13 (Baltimore LATA), MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-512 A BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
240-512 0 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2013-05-09   
240-512 1 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-12   
240-512 2 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2007-12-03   
240-512 3 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
240-512 4 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-07-15   
240-512 5 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2012-11-23   
240-512 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2018-05-31   
240-512 7   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2014-06-25   
240-512 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2019-02-19   
240-512 9 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2019-02-19   
240-540 A BLTMMDCHX6X  530H WIDE VOICE, LLC - MD 238      
240-540 0 BLTMMDCHX7X  073H TELNYX LLC 238   2019-09-27   
240-540 1 BLTMMDCHX6X  530H WIDE VOICE, LLC - MD 238   2016-11-26   
240-540 2 BLTMMDCHXMX  506J TWILIO INTERNATIONAL, INC. 238   2020-12-26   
240-540 3 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2020-03-18   
240-540 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-04-30   
240-540 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-04-30   
240-540 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   
240-540 7 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-06-11   
240-540 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-06-11   
240-540 9 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-06-11   
240-843 A BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
240-843 1 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-12   
240-843 2   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
240-843 3   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
240-843 4 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
240-843 5   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
240-843 6   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
240-843 7   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
240-843 8   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
240-843 9   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-01   
240-881 A BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
240-881 0 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-01-06   
240-881 1 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-01-20   
240-881 2 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-03-14   
240-881 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2022-01-07   
240-881 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2022-01-07   
240-881 5 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-03-14   
240-881 8 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-01-20   
240-881 9 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2023-09-22   
301-307 A CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
301-307 0 CLMAMDCBRP0  9212 VERIZON MARYLAND, INC. 238      
301-307 1 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-11   
301-307 2 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-11   
301-307 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-11-07   
301-307 5 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2019-12-28   
301-307 6 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-23   
301-307 7 BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-06-20   
301-307 8 BLTMMDCHXVX  321J HD CARRIER LLC 238   2020-05-01   

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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