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.

Fairfield, IL

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
618-516 A OLNYILABQMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 978      
618-516 0 OLNYILABQMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 978   2012-04-02   
618-516 1 OLNYILABQMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 978   2003-03-08   
618-516 2 OLNYILABQMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 978   2003-11-11   
618-516 3 OLNYILABQMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 978   2004-04-17   
618-516 4 OLNYILABQMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 978   2005-10-15   
618-516 5 OLNYILABWMD  478J NUSO, LLC 978   2016-03-27   
618-516 6 OLNYILXEFMD  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 978   2017-10-06   
618-516 8 OLNYILXEGMD  224C ONVOY, LLC 978   2020-03-13   
618-599 A OLNYILXEWMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 978      
618-842 A FRFDILXEDS0  1015 FRONTIER NORTH, INC. - IL 978      
618-842 2 FRFDILXEDS0  1015 FRONTIER NORTH, INC. - IL 978      
618-842 3 FRFDILXEDS0  1015 FRONTIER NORTH, INC. - IL 978      
618-842 4 FRFDILXEDS0  1015 FRONTIER NORTH, INC. - IL 978      
618-842 5 FRFDILXEDS0  1015 FRONTIER NORTH, INC. - IL 978      
618-842 6 FRFDILXEDS0  1015 FRONTIER NORTH, INC. - IL 978      
618-842 7 FRFDILXEDS0  1015 FRONTIER NORTH, INC. - IL 978      
618-842 8 OLNYILXEX2X  624H ONVOY SPECTRUM, LLC 978   2023-07-29   
618-842 9 FRFDILXEDS0  1015 FRONTIER NORTH, INC. - IL 978      
618-847 A FRFDILXEDS0  1015 FRONTIER NORTH, INC. - IL 978      
618-847 0 OLNYILAB0MD  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 978   2005-01-30   
618-847 4 FRFDILXEDS0  1015 FRONTIER NORTH, INC. - IL 978      
618-847 5 FRFDILXEDS0  1015 FRONTIER NORTH, INC. - IL 978      
618-847 7 FRFDILXEDS0  1015 FRONTIER NORTH, INC. - IL 978      
618-847 8 FRFDILXEDS0  1015 FRONTIER NORTH, INC. - IL 978      
618-847 9 OLNYILXEEMD  9915 DELTA COMMS, LLC DBA CLEARWAVE COMMUNICATIONS - IL 978   2003-02-05   
618-919 A OLNYILXEWMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 978      
618-919 0 OLNYILXEWMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 978      
618-919 1 OLNYILXEWMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 978      
618-919 2 OLNYILABQMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 978   2014-06-05   
618-919 3 OLNYILABQMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 978   2014-06-05   
618-919 4 OLNYILXEGMD  224C ONVOY, LLC 978   2021-10-16   
618-919 5 OLNYILXEGMD  224C ONVOY, LLC 978   2021-10-16   
618-919 8 OLNYILXEGMD  224C ONVOY, LLC 978   2021-02-26   
618-919 9 OLNYILXEWMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 978      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.