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: 666

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-666 A Bowling Green MO STLSMOGZFMD  965H FRACTEL, LLC 520      
573-666 0 Bowling Green MO STLSMOGZ6MD  073H TELNYX LLC 520   2019-10-02   
573-666 1 Bowling Green MO STLSMOGZDS5  225F PEERLESS NETWORK OF MISSOURI, LLC - MO 520   2020-06-27   
573-666 2 Bowling Green MO STLVMOOH6MD  6529 T-MOBILE USA, INC. 520   2020-11-19   
573-666 6 Bowling Green MO STLSMOGZFMD  965H FRACTEL, LLC 520   2019-10-01   
573-666 9 Bowling Green MO STLSMO05XMX  624H ONVOY SPECTRUM, LLC 520   2024-03-23   

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.