Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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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   073H TELNYX LLC 520   2021-07-23   
618-721 1 Brownstown IL   495J STRATUS NETWORKS 520   2021-12-13   
618-721 2 Brownstown IL   224C ONVOY, LLC 520   2021-07-24   
618-721 3 Brownstown IL   624H ONVOY SPECTRUM, LLC 520   2025-01-04   
618-721 4 Brownstown IL   5562 METROPCS, INC. 520   2022-11-14   
618-721 7 Brownstown IL   5562 METROPCS, INC. 520   2021-09-30   
618-721 8 Brownstown IL   6529 T-MOBILE USA, INC. 520   2024-01-13   
618-721 9 Brownstown IL   6529 T-MOBILE USA, INC. 520   2024-01-13   

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

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