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: 342

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-342 A Solomons MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-342 0 Solomons MD BLTMMDCHXMX  506J TWILIO INTERNATIONAL INC 238   2020-12-26   
443-342 1 Solomons MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-342 2 Solomons MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-04   
443-342 3 Solomons MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-13   
443-342 4 Solomons MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-01-04   
443-342 5 Solomons MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-02-13   
443-342 6 Solomons MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-07-06   
443-342 7 Solomons MD   508J CENTURYLINK COMMUNICATIONS LLC 238   2014-06-25   
443-342 8 Solomons MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2015-06-16   
443-342 9 Solomons MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-04   

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.