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: 255

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
573-255 A Ponder MO PNDRMOXARS0  1885 WINDSTREAM MISSOURI, INC. 520      
573-255 0 Ponder MO   093F ONVOY, LLC - MO 520   2023-08-10   
573-255 1 Ponder MO   093F ONVOY, LLC - MO 520   2022-12-16   
573-255 2 Ponder MO   093F ONVOY, LLC - MO 520   2021-12-19   
573-255 3 Ponder MO   1885 WINDSTREAM MISSOURI, INC. 520      
573-255 4 Ponder MO   093F ONVOY, LLC - MO 520   2021-07-24   
573-255 5 Ponder MO   965H FRACTEL, LLC 520   2020-01-11   
573-255 6 Ponder MO   624H ONVOY SPECTRUM, LLC 520   2025-01-11   
573-255 8 Ponder MO   993E BANDWIDTH.COM CLEC, LLC - MO 520   2020-03-05   
573-255 9 Ponder MO   1885 WINDSTREAM MISSOURI, INC. 520   2020-02-19   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.