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: 405

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
618-405 A Hecker IL CENLILCEGMD  593K MCC TELEPHONY LLC 520      
618-405 0 Hecker IL   073H TELNYX LLC 520   2020-07-10   
618-405 1 Hecker IL   495J STRATUS NETWORKS 520   2020-11-22   
618-405 5 Hecker IL   224C ONVOY, LLC 520   2019-07-29   
618-405 6 Hecker IL   224C ONVOY, LLC 520   2019-07-29   
618-405 8 Hecker IL   624H ONVOY SPECTRUM, LLC 520   2025-01-04   
618-405 9 Hecker IL   224C ONVOY, LLC 520   2023-09-18   

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

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