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: 274 [Rate centres in NPA 274] [Dial plan for NPA 274]

NXX: 218

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
274-218 A Green Bay WI GNBYWIELMMD  700J WAVENATION, LLC 350      
274-218 0 Green Bay WI GNBYWIELMMD  700J WAVENATION, LLC 350   2026-02-16   
274-218 1 Green Bay WI   225C ONVOY, LLC - WI 350   2026-08-21   
274-218 7 Green Bay WI   843C INTRADO COMMUNICATIONS, LLC 350   2026-10-05   
274-218 8 Green Bay WI   225C ONVOY, LLC - WI 350   2026-08-21   
274-218 9 Green Bay WI   007F BANDWIDTH.COM CLEC, LLC - WI 350   2026-09-13   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.