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: 606

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-606 A Fork MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-606 0 Fork MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-10-18   
443-606 1 Fork MD   829J PAETEC ITEL, LLC 238      
443-606 2 Fork MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-10-18   
443-606 3 Fork MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-10-18   
443-606 4 Fork MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-10-18   
443-606 6 Fork MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2015-11-27   
443-606 8 Fork MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-25   
443-606 9 Fork MD   515J IP HORIZON LLC 238   2015-03-21   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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