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: 377

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-377 A Cropsey IL CRPSILXDRS0  1015 FRONTIER NORTH, INC. - IL 366      
309-377 0 Cropsey IL BLTNILXDXMX  224C ONVOY, LLC 366   2019-07-14   
309-377 1 Cropsey IL BLTNILXDXMX  224C ONVOY, LLC 366   2019-07-14   
309-377 2 Cropsey IL CRPSILXDRS0  1015 FRONTIER NORTH, INC. - IL 366      
309-377 3 Cropsey IL CRPSILXDRS0  1015 FRONTIER NORTH, INC. - IL 366      
309-377 4 Cropsey IL BLTNILXDXMX  224C ONVOY, LLC 366   2020-05-21   
309-377 5 Cropsey IL BLTNILATVMD  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 366   2004-07-16   
309-377 6 Cropsey IL BLTNILXDXMX  224C ONVOY, LLC 366   2019-01-17   
309-377 7 Cropsey IL BLTNILXDXZX  508J CENTURYLINK COMMUNICATIONS, LLC 366   2014-08-12   
309-377 8 Cropsey IL BLTNILXDXMX  224C ONVOY, LLC 366   2020-05-21   
309-377 9 Cropsey IL BLTNILXDXMX  224C ONVOY, LLC 366   2020-05-21   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.