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.

Switch: MDSOWIGTAMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
608-298 7 Madison WI 516C AT&T CORP. 354      
608-352 A Janesville WI 516C AT&T CORP. 354      
608-352 7 Janesville WI 516C AT&T CORP. 354   2008-07-05   
608-368 A Beloit WI 516C AT&T CORP. 354      
608-368 8 Beloit WI 516C AT&T CORP. 354      
608-422 5 Madison WI 516C AT&T CORP. 354   2014-07-31   
608-665 3 Madison WI 516C AT&T CORP. 354   2011-04-20   
608-719 5 Stoughton WI 516C AT&T CORP. 354   2011-12-15   
608-736 A Evansville WI 516C AT&T CORP. 354      
608-736 7 Evansville WI 516C AT&T CORP. 354   2010-02-10   
608-765 A Richmond WI 516C AT&T CORP. 354      
608-765 7 Richmond WI 516C AT&T CORP. 354   2011-09-12   
779-475 5 South Beloit IL 516C AT&T CORP. 354   2011-11-09   

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

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