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: 721

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
618-721 A Brownstown IL STLSMOPL6MD  073H TELNYX LLC 520      
618-721 0 Brownstown IL STLSMOPL6MD  073H TELNYX LLC 520   2021-07-23   
618-721 1 Brownstown IL COVLILCQXMX  495J STRATUS NETWORKS 520   2021-12-13   
618-721 2 Brownstown IL STLSMOWQDS2  224C ONVOY, LLC 520   2021-07-24   
618-721 3 Brownstown IL STLSMO05XMX  624H ONVOY SPECTRUM, LLC 520   2025-01-04   
618-721 4 Brownstown IL STLVMOOH6MD  5562 METROPCS, INC. 520   2022-11-14   
618-721 7 Brownstown IL STLVMOOH6MD  5562 METROPCS, INC. 520   2021-09-30   
618-721 8 Brownstown IL STLVMOOH6MD  6529 T-MOBILE USA, INC. 520   2024-01-13   
618-721 9 Brownstown IL STLVMOOH6MD  6529 T-MOBILE USA, INC. 520   2024-01-13   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.