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: 238

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-238 A Parkton MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-238 0 Parkton MD   876D ONVOY, LLC - MD 238      
443-238 1 Parkton MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-238 2 Parkton MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-238 3 Parkton MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-238 4 Parkton MD   145J TERRA NOVA TELECOM INC. 238      
443-238 5 Parkton MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-238 6 Parkton MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-238 7 Parkton MD BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238      
443-238 8 Parkton MD BLTMMDCHX7X  073H TELNYX LLC 238      
443-238 9 Parkton MD   145J TERRA NOVA TELECOM INC. 238      

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.