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: 573 [Rate centres in NPA 573] [Dial plan for NPA 573]

NXX: 437

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-437 A Owensville MO OWVLMOXARS1  1882 FIDELITY TELEPHONE, LLC 520      
573-437 1 Owensville MO OWVLMOXARS1  1882 FIDELITY TELEPHONE, LLC 520      
573-437 2 Owensville MO OWVLMOXARS1  1882 FIDELITY TELEPHONE, LLC 520      
573-437 3 Owensville MO OWVLMOXARS1  1882 FIDELITY TELEPHONE, LLC 520      
573-437 4 Owensville MO OWVLMOXARS1  1882 FIDELITY TELEPHONE, LLC 520      
573-437 5 Owensville MO OWVLMOXARS1  1882 FIDELITY TELEPHONE, LLC 520      
573-437 6 Owensville MO OWVLMOXARS1  1882 FIDELITY TELEPHONE, LLC 520      
573-437 7 Owensville MO OWVLMOXARS1  1882 FIDELITY TELEPHONE, LLC 520      
573-437 8 Owensville MO OWVLMOXARS1  1882 FIDELITY TELEPHONE, LLC 520      
573-437 9 Owensville MO   145J TERRA NOVA TELECOM INC. 520   2025-05-31   

Last updated: Sat, 15 Nov 2025 03:38:44 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.