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: 674

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
618-674 A Carriers Mills IL CRDLILAB0MD  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 362      
618-674 0 Carriers Mills IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 362      
618-674 1 Carriers Mills IL   073H TELNYX LLC 362   2020-06-22   
618-674 3 Carriers Mills IL   624H ONVOY SPECTRUM, LLC 362   2023-06-30   
618-674 4 Carriers Mills IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 362   2004-07-02   
618-674 5 Carriers Mills IL   224C ONVOY, LLC 362   2021-08-09   
618-674 6 Carriers Mills IL   224C ONVOY, LLC 362   2018-10-01   
618-674 7 Carriers Mills IL   846F MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 362   2022-12-10   
618-674 8 Carriers Mills IL   495J STRATUS NETWORKS 362   2020-12-19   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.