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: 417 [Rate centres in NPA 417] [Dial plan for NPA 417]

NXX: 443

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
417-443 A Highlandville MCA2 MO HLDVMOXADS0  9787 BRIGHTSPEED OF MISSOURI, LLC 522      
417-443 0 Highlandville MCA2 MO   9787 BRIGHTSPEED OF MISSOURI, LLC 522      
417-443 1 Highlandville MCA2 MO   9787 BRIGHTSPEED OF MISSOURI, LLC 522      
417-443 2 Highlandville MCA2 MO   9787 BRIGHTSPEED OF MISSOURI, LLC 522      
417-443 3 Highlandville MCA2 MO   9787 BRIGHTSPEED OF MISSOURI, LLC 522      
417-443 4 Highlandville MCA2 MO   145J TERRA NOVA TELECOM INC. 522   2025-07-18   
417-443 6 Highlandville MCA2 MO   9787 BRIGHTSPEED OF MISSOURI, LLC 522      
417-443 7 Highlandville MCA2 MO   829J PAETEC ITEL, LLC 522   2013-05-19   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.