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: 797

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
417-797 A Dora MO BASNMO06DS0  142C RYSTEC, INC 522      
417-797 0 Dora MO BASNMO06DS0  142C RYSTEC, INC 522   2004-12-30   
417-797 1 Dora MO BASNMOXAXJX  093F ONVOY, LLC - MO 522   2020-11-15   
417-797 2 Dora MO BASNMOXAXJX  093F ONVOY, LLC - MO 522   2020-11-15   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.