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: MILWWI30DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
414-321 A Milwaukee Zone 1 WI 9327 WISCONSIN BELL INC 356      
414-327 A Milwaukee Zone 1 WI 9327 WISCONSIN BELL INC 356      
414-328 A Milwaukee Zone 1 WI 9327 WISCONSIN BELL INC 356      
414-329 A Milwaukee Zone 1 WI 9327 WISCONSIN BELL INC 356      
414-541 A Milwaukee Zone 1 WI 9327 WISCONSIN BELL INC 356      
414-543 A Milwaukee Zone 1 WI 9327 WISCONSIN BELL INC 356      
414-545 A Milwaukee Zone 1 WI 9327 WISCONSIN BELL INC 356      
414-546 A Milwaukee Zone 1 WI 9327 WISCONSIN BELL INC 356      
414-604 A Milwaukee Zone 1 WI 9327 WISCONSIN BELL INC 356      
414-939 A Milwaukee Zone 1 WI 9327 WISCONSIN BELL INC 356      

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

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