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: MDSNWI16DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
608-270 A Madison WI 9327 WISCONSIN BELL INC 354      
608-271 A Madison WI 9327 WISCONSIN BELL INC 354      
608-273 A Madison WI 9327 WISCONSIN BELL INC 354      
608-274 A Madison WI 9327 WISCONSIN BELL INC 354      
608-275 A Madison WI 9327 WISCONSIN BELL INC 354      
608-276 A Madison WI 9327 WISCONSIN BELL INC 354      
608-277 A Madison WI 9327 WISCONSIN BELL INC 354      
608-278 A Madison WI 9327 WISCONSIN BELL INC 354      
608-288 A Madison WI 9327 WISCONSIN BELL INC 354      
608-298 A Madison WI 9327 WISCONSIN BELL INC 354      

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

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