Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX: 530

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-530 A Dundalk MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-530 0 Dundalk MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-530 1 Dundalk MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-530 2 Dundalk MD   515J IP HORIZON LLC 238   2016-10-14   
443-530 3 Dundalk MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-02-14   
443-530 4 Dundalk MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-10-01   
443-530 5 Dundalk MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-01-22   
443-530 6 Dundalk MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2016-04-28   
443-530 7 Dundalk MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2018-05-28   
443-530 8 Dundalk MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-25   
443-530 9 Dundalk MD   829J PAETEC ITEL, LLC 238      

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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