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: 641

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-641 A Clark MO CLRKMOXARS0  9784 BRIGHTSPEED OF MISSOURI, LLC 521      
573-641 0 Clark MO   073H TELNYX LLC 521   2020-07-30   
573-641 1 Clark MO   792K CHARTER IP ENABLED SERVICES, LLC 521   2024-11-10   
573-641 2 Clark MO   093F ONVOY, LLC - MO 521   2019-11-29   
573-641 3 Clark MO   093F ONVOY, LLC - MO 521   2019-09-02   
573-641 4 Clark MO   4932 LEVEL 3 COMMUNICATIONS, LLC - MO 521   2013-08-26   
573-641 5 Clark MO   9784 BRIGHTSPEED OF MISSOURI, LLC 521      
573-641 8 Clark MO   093F ONVOY, LLC - MO 521   2019-11-29   
573-641 9 Clark MO   9784 BRIGHTSPEED OF MISSOURI, LLC 521      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.