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: 437

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
618-437 A Ina IL INA ILXERS0  1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 520      
618-437 0 Ina IL INA ILXERS0  1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 520      
618-437 1 Ina IL STLSMOWQ8MD  073H TELNYX LLC 520      
618-437 2 Ina IL STLSMOWQDS2  224C ONVOY, LLC 520      
618-437 3 Ina IL COVLILCQXEX  508J CENTURYLINK COMMUNICATIONS, LLC 520      
618-437 4 Ina IL STLSMOWQDS2  224C ONVOY, LLC 520      
618-437 5 Ina IL INA ILXERS0  1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 520      
618-437 6 Ina IL COVLILCQXIX  984E BANDWIDTH.COM CLEC, LLC - IL 520      
618-437 7 Ina IL STLSMOWQDS2  224C ONVOY, LLC 520      
618-437 8 Ina IL STLSMOWQDS2  224C ONVOY, LLC 520      
618-437 9 Ina IL INA ILXERS0  1183 CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL 520      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.