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: 309 [Rate centres in NPA 309] [Dial plan for NPA 309]

NXX: 387

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-387 A Groveland IL GVLDILXDRS1  1015 FRONTIER NORTH, INC. - IL 368      
309-387 0 Groveland IL PEORILPJDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 368   2015-11-02   
309-387 1 Groveland IL PEORILPJXYX  224C ONVOY, LLC 368   2019-07-15   
309-387 2 Groveland IL GVLDILXDRS1  1015 FRONTIER NORTH, INC. - IL 368      
309-387 6 Groveland IL GVLDILXDRS1  1015 FRONTIER NORTH, INC. - IL 368      
309-387 8 Groveland IL PEORILPJXTZ  318J COMCAST IP PHONE, LLC 368   2007-09-23   
309-387 9 Groveland IL PEORILPJXYX  224C ONVOY, LLC 368   2019-07-15   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.