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: 778

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
417-778 A Alton MO ALTNMOXARS0  9787 BRIGHTSPEED OF MISSOURI, LLC 522      
417-778 0 Alton MO   993E BANDWIDTH.COM CLEC, LLC - MO 522   2020-03-12   
417-778 1 Alton MO   9787 BRIGHTSPEED OF MISSOURI, LLC 522      
417-778 2 Alton MO   145J TERRA NOVA TELECOM INC. 522   2025-07-14   
417-778 3 Alton MO   093F ONVOY, LLC - MO 522   2007-02-09   
417-778 4 Alton MO   093F ONVOY, LLC - MO 522   2021-03-05   
417-778 5 Alton MO   4932 LEVEL 3 COMMUNICATIONS, LLC - MO 522   2015-12-10   
417-778 6 Alton MO   9787 BRIGHTSPEED OF MISSOURI, LLC 522      
417-778 7 Alton MO   9787 BRIGHTSPEED OF MISSOURI, LLC 522      
417-778 8 Alton MO   093F ONVOY, LLC - MO 522   2019-09-02   
417-778 9 Alton MO   5562 METROPCS, INC. 522   2025-04-10   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.