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: 913 [Rate centres in NPA 913] [Dial plan for NPA 913]

NXX: 578

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
913-578 A Leavenworth KS LVWOKSSHDS0  9533 SOUTHWESTERN BELL 524      
913-578 0 Leavenworth KS   205F ONVOY, LLC - KS 524   2019-05-27   
913-578 1 Leavenworth KS   9533 SOUTHWESTERN BELL 524      
913-578 2 Leavenworth KS   829J PAETEC ITEL, LLC 524   2017-05-30   
913-578 3 Leavenworth KS   205F ONVOY, LLC - KS 524   2022-10-13   
913-578 4 Leavenworth KS   9533 SOUTHWESTERN BELL 524   2010-12-10   
913-578 5 Leavenworth KS   829J PAETEC ITEL, LLC 524   2010-05-27   
913-578 6 Leavenworth KS   205F ONVOY, LLC - KS 524   2022-11-12   
913-578 7 Leavenworth KS   508J CENTURYLINK COMMUNICATIONS, LLC 524   2014-07-18   
913-578 8 Leavenworth KS   205F ONVOY, LLC - KS 524   2019-05-27   
913-578 9 Leavenworth KS   205F ONVOY, LLC - KS 524   2019-05-27   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.