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: 708 [Rate centres in NPA 708] [Dial plan for NPA 708]

NXX: 303

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
708-303 A Cicero IL BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
708-303 0 Cicero IL   073H TELNYX LLC 358   2018-06-28   
708-303 1 Cicero IL   224C ONVOY, LLC 358   2004-09-17   
708-303 2 Cicero IL   624H ONVOY SPECTRUM, LLC 358   2021-06-27   
708-303 3 Cicero IL   145J TERRA NOVA TELECOM INC. 358   2021-10-29   
708-303 4 Cicero IL   460K FIRST COMMUNICATIONS, LLC 358   2005-02-25   
708-303 5 Cicero IL   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2005-10-29   
708-303 6 Cicero IL   224C ONVOY, LLC 358   2021-07-04   
708-303 7 Cicero IL   224C ONVOY, LLC 358   2021-03-01   
708-303 8 Cicero IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2008-12-12   
708-303 9 Cicero IL   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.