Local Calling Guide

Area code/prefix search

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

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
667-910 2 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2021-07-29   
667-910 3 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2021-07-29   
667-910 4 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2021-07-29   
667-910 5 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2021-07-29   
667-910 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-08-28   
667-910 7 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2021-10-30   
667-910 8 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2021-09-10   
667-910 9 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-04-30   
667-930 A BLTMMDCHUMD  156J RCLEC, INC. 238      
667-930 0 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2015-11-07   
667-930 1 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-02-19   
667-930 2 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-02-19   
667-930 3 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2015-08-11   
667-930 4 BLTMMDCHUMD  156J RCLEC, INC. 238   2015-05-18   
667-930 5 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2020-05-01   
667-930 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-02-19   
667-930 7 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2016-11-05   
667-930 8 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2016-11-05   
667-930 9 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2016-11-05   

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Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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