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: 200

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-200 A Woodlawn MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-200 0 Woodlawn MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-200 1 Woodlawn MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-200 2 Woodlawn MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-08-04   
443-200 3 Woodlawn MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-200 4 Woodlawn MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-200 5 Woodlawn MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-08-04   
443-200 6 Woodlawn MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-200 7 Woodlawn MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-200 8 Woodlawn MD BLTMMDCHXHX  515J IP HORIZON LLC 238   2021-08-15   
443-200 9 Woodlawn MD BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.