Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX: 383

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-383 A Silver Run MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-383 0 Silver Run MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-383 1 Silver Run MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-383 2 Silver Run MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-383 3 Silver Run MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-383 4 Silver Run MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-383 5 Silver Run MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-383 6 Silver Run MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
443-383 7 Silver Run MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238      
443-383 8 Silver Run MD BLTMMDCHX7X  073H TELNYX LLC 238      
443-383 9 Silver Run MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.