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.
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Switch: MDSNWI12DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
608-240 A Madison WI 9327 WISCONSIN BELL INC 354      
608-241 A Madison WI 9327 WISCONSIN BELL INC 354      
608-242 A Madison WI 9327 WISCONSIN BELL INC 354      
608-243 A Madison WI 9327 WISCONSIN BELL INC 354      
608-244 A Madison WI 9327 WISCONSIN BELL INC 354      
608-245 A Madison WI 9327 WISCONSIN BELL INC 354      
608-246 A Madison WI 9327 WISCONSIN BELL INC 354      
608-249 A Madison WI 9327 WISCONSIN BELL INC 354      
608-301 A Madison WI 9327 WISCONSIN BELL INC 354      
608-458 A Madison WI 9327 WISCONSIN BELL INC 354      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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