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: 618 [Rate centres in NPA 618] [Dial plan for NPA 618]

NXX: 598

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
618-598 A Okawville IL STLSMOWQDS2  224C ONVOY, LLC 520      
618-598 0 Okawville IL   073H TELNYX LLC 520   2020-10-03   
618-598 1 Okawville IL   224C ONVOY, LLC 520   2020-08-21   
618-598 2 Okawville IL   224C ONVOY, LLC 520   2020-08-21   
618-598 3 Okawville IL   224C ONVOY, LLC 520   2021-02-26   
618-598 6 Okawville IL   984E BANDWIDTH.COM CLEC, LLC - IL 520   2021-06-14   
618-598 7 Okawville IL   490J DISH WIRELESS, LLC 520   2022-12-01   
618-598 8 Okawville IL   495J STRATUS NETWORKS 520   2020-11-22   
618-598 9 Okawville IL   624H ONVOY SPECTRUM, LLC 520   2025-01-04   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.