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: 874

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
309-874 A McLean IL MCLNILXDRS2  1015 FRONTIER NORTH, INC. - IL 366      
309-874 2 McLean IL MCLNILXDRS2  1015 FRONTIER NORTH, INC. - IL 366      
309-874 3 McLean IL MCLNILXDRS2  1015 FRONTIER NORTH, INC. - IL 366      
309-874 4 McLean IL BLTNILATVMD  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 366   2004-07-17   
309-874 9 McLean IL   145J TERRA NOVA TELECOM INC. 366   2022-11-02   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.